Version Of Map Research Articles

Asset mapping 2.0; contextual, iterative, and virtual mapping for community development

ABSTRACT We argue a re-appraisal of asset mapping is needed based on revisiting the concept of assets. Asset mapping is useful for inter/trans-disciplinary work involving complex systems: organizations, administrations, governance systems, social-ecological systems, etc. Asset mapping can be an integrative method, allowing a combination of different disciplinary insights and knowledge types; co-defining what is valuable in and for a system. We propose a new version of asset mapping that combines contextual, iterative, and virtual asset mapping in different manners depending on the system and situation. The unpredictable character of co-evolution makes iterative asset mapping important, contextual asset mapping allows different delineations of relevant contexts, and virtual asset mapping entails recognizing assets in different futures, either scenario-based or as strategy options. We argue that this novel approach is particularly important for planning, in the broad sense, because it provides a bridging opportunity with other fields, connecting discourses and policy.

Does global positioning system-based navigation dependency make your sense of direction poor? A psychological assessment and eye-tracking study.

BackgroundGlobal positioning system (GPS)-based navigation apps are very useful in our lives. However, whether and how the usage of these apps affects spatial cognition and the sense of direction is still unclear.MethodsA total of 108 individuals were recruited and completed the GPS dependence, internet gaming behavior, and impulsivity test using scales. The eye-tracking-based general mental rotation (MR) task and target finding (TF; require individuals to find a target specified in a 3D street map in a rotated version of top 2D view map) task were used to assess their spatial cognition and the sense of direction. The correlation was used to relate GPS navigation usage, spatial cognition ability, and impulsivity. Subgroup analyses stratifying by gaming hours of individuals (< 2 h or ≥ 2 h) or maps (countryside or city) in TF task were performed. The moderating and mediating effect analyses were conducted to verify these relationships.ResultsThe GPS dependency score was nominal positively correlated with fixations in the TF task in the entire cohort (r = 0.202, unadjusted p = 0.036); it was significant in city (r = 0.254, p = 0.008) and gaming time of < 2 h (r = 0.459, p = 0.001) subgroups. The high-score (upper 30%) group of GPS dependency had more fixations on the original target building in the training area and indicative building in the test area than the low-score (lower 30%) group. GPS dependency was not associated with the correct rate and reaction time in the TF task or any of the indicators in the MR task (p > 0.05). The GPS dependency mediated the indirect effect of impulsivity on the fixations on TF. The internet gaming time moderated the association between GPS dependency and fixations on TF.ConclusionThe dependency on GPS-based navigation apps was associated with impaired spatial cognition but may not significantly affect the sense of direction.

Sinus rhythm endocardial mapping for channels identification in ischemic ventricular tachycardia using a modified electrophysiological triad

Abstract Background In a previous study it was demonstrated that an electrophysiological triad was able to identify critical isthmus in atrial flutter (AFL) patients. This triad is based in the Carto® electroanatomical mapping (EAM) version 7, which displays a histogram of the local activation times (LAT) of the tachycardia cycle length (TCL), in addition to the activation and voltage maps. Purpose This study aimed to prospectively assess the ability of a modified electrophysiological triad to identify and localize the ventricular tachycardia's (VT) channels and entrance zones during sinus rhythm mapping. Methods Prospective analysis of a unicentric registry of individuals who underwent ischemic VT ablation with Carto® EAM, all in sinus rhythm. All patients with non-ischemic etiology, lack of high-density EAM or lack of mapping in any of the left ventricle walls or structures were excluded. Areas of late potentials and possible channels of re-entry were compared to a modified electrophysiological triad constituted by: areas of low-voltage (&amp;lt;0.5mV), a site of deep histogram valley (LAT-Valley) with less than 20% density points relative to the highest density zone and a prolonged LAT-Valley duration that included 10% or more of the total activation time mapped. We also assessed the relationship between the pre-valley bar (the LAT histogram bar immediately before the prolonged LAT-Valley) and the channel entrances. Results A total of 14 patients (14 men, median age 70 IQR 64–78 years) were included. All patients presented with ischemic VT and 86% had a previous inferior myocardial infarction. The median number of collected points were 1733 (IQR 1363–2729). All sinus rhythm maps presented with at least 1 LAT-Valley in the analysed histograms. All arrhythmias were effectively treated after undergoing radiofrequency in the LAT-Valley location, either by blocking the channel entrances or scar homogenization ablation strategy. Also, the pre-valley bar in the histogram marked all the channel entrances in the scar borders. No patient had relapse after a clinical follow up of over 6 months. Conclusion In a prospective analysis, a modified electrophysiological triad was able to identify the scar channels in sinus rhythm in all patients. The pre-valley bar in the histogram disclosed the channel entrances. Further studies are needed to assess the usefulness of this algorithm to simplify catheter ablation and improve clinical outcomes. Funding Acknowledgement Type of funding sources: None.

Implementasi Algoritma Learning Vector Quantization Untuk Pengenalan Barcode Barang

Problems in barcode recognition during the barcode identification process. Where when the barcode has noise (damage) then the barcode becomes difficult to recognize. Learning Vector Quantization (LVQ) is a classification method in which each output unit presents a class. LVQ is used for grouping and is also one of the artificial neural networks which is a competitive learning algorithm supervised version of the Kohonen Self-Organizing Map (SOM) algorithm. The purpose of this algorithm is to approach the distribution of vector classes in order to minimize errors in classifying. LVQ learning models are trained significantly to be faster than other algorithms such as the Back Propagation Neural Network. This can summarize or reduce large datasets for a small number of vectors. Based on the results of barcode recognition testing using LVQ algorithm success with training data as much as 4 and conducted calrifikas trial of two data namely: {1,1,1,0} and {1,0,1,1}. Obtained accuracy value generated as much as 90% barcode recognized. The more training data used, LVQ will have a more complete knowledge.

Retrieval of Stratospheric Ozone Profiles from Limb Scattering Measurements of the Backward Limb Spectrometer on Chinese Space Laboratory Tiangong-2: Preliminary Results

The Backward Limb Spectrometer (BLS) onboard the Tiangong-2 (TG-2) space laboratory, the first spaceborne limb sounding instrument of China, was successfully launched on 15 September 2016, and its measurements of scattered photons of sunlight along the limb line-of-sight (LOS) in the 290–1000 nm range could be used to derive the vertical distribution of stratospheric ozone with high vertical resolution. Ozone profiles with a vertical resolution of one km in 10–40 km and 30–50 km were retrieved by the triplet and pair methods, respectively, and the ozone profiles retrieved by the BLS were compared with the ozone sounding data over four sounding stations. Meanwhile, the Ozone Mapping and Profiler Suite Limb Profiler (OMPS/LP) version 2.5 (v2.5) stratospheric ozone profile product was also introduced for comparison. The retrieval results showed a good agreement with the ozone profiles of ozone sounding and the OMPS/LP v2.5 product, and the differences were basically within 25% above 20 km, while relatively larger differences occasionally occurred below 20 km. The case studies over four sites worldwide demonstrate that the BLS is capable of measuring stratospheric ozone profiles with high vertical resolution.

A new road to improve vitamin D and balance through Taopatch® and proprioceptive protocol in Multiple Sclerosis patients.

In multiple sclerosis patients (MS), symptoms such as fatigue, lack of physical energy, spasticity, motor coordination disorders, tremors, dizziness and postural instability are most common. Cattaneo et al. (2007) studied the effects of stability training on MS patients, describing its efficacy in reducing all risks, by improving stability, and strength. The present study aimed to confirm our 2021 results on MS patients, combining the Taopatch® device with a proprioceptive rehabilitation protocol (PRP) targeting strength, balance, and biochemical parameters including vitamin D levels. Twenty MS patients, 8 males and 12 females, volunteered in the study. A KERN MAP Version 1.2 08/2012, Hand Grip Dynamometer was used to determine handgrip strength, whilst baropodometric and stabilometric measurements were assessed using the Sensor Medica® systems. The proprioceptive rehabilitation protocol included: 10 minutes of Motomed; 10 minutes of Human Tecar proprioceptive path; 15 minutes of physical exercises; and 15 minutes of massage therapy of whole spine. All patients wore the Taopatch photo emission devices (Tao Technologies), applied with the protocol of Carbonari B, et al. (2021) Testing procedures and blood sampling were carried out before and after the rehabilitation protocol. The paired sample t-test revealed statistically significant improvements for the baropodometric measures (p<0.05). In addition, the intervention induced a statistically significant improvement in the right (p = 0.023) and left (p = 0.021) handgrip strength. We didn't highlighted any statistically significant variation in hemathological parameters, but an increasing trend of vitamin D levels was detected. Combination of an adequate and specific rehabilitation protocol with application of Taopatch®, a photon emission device, improved handgrip strength of the upper limbs, rebalanced body structure decompensated in MS patients and also acting on vitamin D levels. In conclusion, Taopatch® is a supportive therapy for home-based PRP intervention, inducing an improvement in the quality of life and reducing spasticity associated with the disease.

Color stereo image encryption and local zero-watermarking schemes using octonion Hahn moments and modified Henon map

Discrete orthogonal moments (DOMs) are widely applied in the field of image processing. However, most existing DOMs are used for flat image analysis and are less suitable for color stereo image processing. In light of this limitation, this paper firstly presents a moments type called octonion Hahn moments (OHMs) for the compact analysis of color stereo images, and also for preserving the internal relations between all the color channels of the stereo image. OHMs are introduced in both Cartesian and polar coordinates. Secondly, we present a modified version of 2D Henon map that exhibits improved chaotic behavior over its original version. This version is introduced for potential deployment in the field of information security. Thirdly, we present an efficient color stereo image encryption scheme in the transform domain using the modified Henon’s map and OHMs that are defined in Cartesian space. This scheme guarantees a perfect reconstruction of the stereo image. Finally, we present a local zero-watermarking scheme for color stereo image copyrighting based on the proposed version of Henon’s map and OHMs that are defined in the polar coordinate space. This scheme is originally designed to be robust against image rotation attack. Compared to excellent existing encryption schemes, our scheme shows superior performance in terms of high security level and good robustness to various attacks (classical, statistical, noise addition, cropping, etc.). Moreover, the proposed zero-watermarking method shows stronger resistance to different types of attacks (geometric, common image processing, noise, desynchronization, etc.) in comparison to recent zero-watermarking methods.

Comparing Two Versions of a Separation Map in Reversed Phase Liquid Chromatography

Comparing Two Versions of a Separation Map in Reversed Phase Liquid Chromatography

Cao et al. (2022) Background secondaries detected by a version of STSTI map

Cao et al. (2022) Background secondaries detected by a version of STSTI map

The structure of natural landscapes and its role in the development of the landscape zoning scheme of Belarus

The article presents the results of systematisation and mapping of the natural landscapes of Belarus, which domestic researchers have been engaged since the 1960s. During this time, considerable cartographic and literary material concerning the peculiarities of distribution, a set of classification units and zoning units, approaches to their allocation and mapping has been accumulated. However, the appearance at the beginning of the 21st century of new research methods along with the possibility of using modern technologies determined the need to refine and detail many cartographic landscape developments. At the same period (2006–2015), a series of 1 : 500 000 scale wall-mounted physical and geographical maps was created in Belarus and updated information was obtained about the features of the territorial distribution of a number of components of nature. The appearance of such information, along with the available data of remote sensing of the Earth and the possibility of application of geoinformation technologies, also allowed the development of new, detailed versions of maps of natural landscapes, both for institutions of higher and general secondary education using 6 classification units. One of them – map for institutions of higher education on a scale of 1: 500 000 – served as the basis for the analysis and identification of patterns of spatial distribution of natural territorial complexes in the rank of subtypes, groups of genera, genera and species of landscapes. An increase in the number of main classification units was found – genera (from 20 to 22) and species (from 105 to 107) – within the 2 subtypes, as well as a significant change in their area, boundaries and features of spatial distribution. The obtained results served as a basis for clarifying the distribution of regional complexes, which led to the compilation of a new version of the landscape zoning scheme. It was revealed that the number of provinces remained the same, their borders were clarified (the areas changed within 1–5 %) and names. The number of landscape districts has decreased from 56 to 53, their borders, areas and names have changed significantly.

Development of probabilistic seismic hazard microzonation maps at the surface level for central-east Iran (Kerman region), using a hybrid site condition model

This study presents the spatial distribution of a grid-based probabilistic seismic hazard model at the surface level for the Kerman region in central-east Iran, using a hybrid site condition model. The hazard model has provided the variation of the peak ground acceleration (PGA), and 5% damped spectral accelerations (SA) at the fundamental periods of 0.2 and 1.0 seconds (s) on 0.05° grids. The study has used a seismotectonic dataset including ∼400 linear seismic sources to characterize the seismic source models. In order to capture the uncertainties of the seismic hazard sources, the model used a logic tree approach, including eight ground motion prediction equations (GMPEs), three characteristic source models, two different declustering methods, three choices for earthquake recurrence parameters, and three alternatives for the maximum credible earthquake. Besides, various GMPEs have been evaluated against local datasets. For this, a series of GMPEs developed based on local, regional, and global data have been selected to find their compatibility with the studied area through statistical analyses, so-called likelihood (LH), and log-likelihood (LLH) tests. Generally, the results display that a wide range of seismic hazards can be expected in the region. For instance, the horizontal PGA with a 10% probability of exceedance in 50 years, ranges between ∼(0.1–0.5)g in the north-eastern and south-western parts of the region, respectively. Moreover, the results indicate that the ad-hoc 1.5 factor to scale a 475-year return period (RP) spectrum for making the ground shaking similar to a 2475-year RP not only is unrealistic, but also creates substantially an underestimated ground shaking; thus, it seems too crude for the seismic design purposes. We have also developed some relationships, dependent on site conditions, for describing general relations between the obtained results in the return periods of 475- and 2475-years for PGA, SA (0.2s), and SA (1.0s). The computed hazard spectra have also been compared to the minimum acceptable level of seismic hazard in the region, according to the latest version of the Iranian national seismic hazard map. In addition, in order to make the results more transparent to the scientific and engineering community, the range of uncertainty contributed to the hazard modeling has also been explored in terms of a relative uncertainty metric. In total, the outcome of this study can make transparency into the picture of the seismic hazard level in central-east Iran and shed insight into possible developing plans.

A Weak Shadow of Early Life Language Processing Persists in the Right Hemisphere of the Mature Brain.

Studies of language organization show a striking change in cerebral dominance for language over development: We begin life with a left hemisphere (LH) bias for language processing, which is weaker than that in adults and which can be overcome if there is a LH injury. Over development this LH bias becomes stronger and can no longer be reversed. Prior work has shown that this change results from a significant reduction in the magnitude of language activation in right hemisphere (RH) regions in adults compared to children. Here we investigate whether the spatial distribution of language activation, albeit weaker in magnitude, still persists in homotopic RH regions of the mature brain. Children aged 4–13 (n = 39) and young adults (n = 14) completed an auditory sentence comprehension fMRI (functional magnetic resonance imaging) task. To equate neural activity across the hemispheres, we applied fixed cutoffs for the number of active voxels that would be included in each hemisphere for each participant. To evaluate homotopicity, we generated left-right flipped versions of each activation map, calculated spatial overlap between the LH and RH activity in frontal and temporal regions, and tested for mean differences in the spatial overlap values between the age groups. We found that, in children as well as in adults, there was indeed a spatially intact shadow of language activity in the right frontal and temporal regions homotopic to the LH language regions. After a LH stroke in adulthood, recovering early-life activation in these regions might assist in enhancing recovery of language abilities.

Sinus rhythm endocardial mapping for channels identification in ischemic ventricular tachycardia using a modified electrophysiological triad

Abstract Funding Acknowledgements Type of funding sources: None. Background In a previous study it was demonstrated that an electrophysiological triad was able to identify critical isthmus in atrial flutter (AFL) patients. This triad is based in the Carto® electroanatomical mapping (EAM) version 7, which displays a histogram of the local activation times (LAT) of the tachycardia cycle length (TCL), in addition to the activation and voltage maps. Purpose This study aimed to prospectively assess the ability of a modified electrophysiological triad to identify and localize the ventricular tachycardia’s (VT) channels and entrance zones during sinus rhythm mapping. Methods Prospective analysis of a unicentric registry of individuals who underwent ischemic VT ablation with Carto® EAM, all in sinus rhythm. All patients with non-ischemic etiology, lack of high-density EAM or lack of mapping in any of the left ventricle walls or structures were excluded. Areas of late potentials and possible channels of re-entry were compared to a modified electrophysiological triad constituted by: areas of low-voltage (&amp;lt;0.5mV), a site of deep histogram valley (LAT-Valley) with less than 20% density points relative to the highest density zone and a prolonged LAT-Valley duration that included 10% or more of the total activation time mapped. We also assessed the relationship between the pre-valley bar (the LAT histogram bar immediately before the prolonged LAT-Valley) and the channel entrances. Results A total of 14 patients (14 men, median age 70 IQR 64-78 years) were included. All patients presented with ischemic VT and 86% had a previous inferior myocardial infarction. The median number of collected points were 1733 (IQR 1363─2729). All sinus rhythm maps presented with at least 1 LAT-Valley in the analysed histograms. All arrhythmias were effectively treated after undergoing radiofrequency in the LAT-Valley location, either by blocking the channel entrances or scar homogenization ablation strategy. Also, the pre-valley bar in the histogram marked all the channel entrances in the scar borders. No patient had relapse after a clinical follow up of over 6 months. Conclusion In a prospective analysis, a modified electrophysiological triad was able to identify the scar channels in sinus rhythm in all patients. The pre-valley bar in the histogram disclosed the channel entrances. Further studies are needed to assess the usefulness of this algorithm to simplify catheter ablation and improve clinical outcomes.

A Mean Convergence Theorem without Convexity for Finite Commutative Nonlinear Mappings in Reflexive Banach Spaces

This paper investigates the Bregman version of the Takahashi-type generic 2-generalized nonspreading mapping which includes the generic 2-generalized Bregman nonspreading mapping as a special case. Relative to the attractive points of nonlinear mapping, the Baillon-type nonlinear mean convergence theorem for finite commutative generic 2-generalized Bregman nonspreading mappings without the convexity assumption is proved in the setting of reflexive Banach spaces. Using this result, some new and well-known nonlinear mean convergence theorems for the finite generic generalized Bregman nonspreading mapping, the 2-generalized Bregman nonspreading mapping and the normally 2-generalized hybrid mapping, among others, are established. Our results extend and generalize many corresponding ones announced in the literature.

The C-Band All-Sky Survey (C-BASS): template fitting of diffuse galactic microwave emission in the northern sky

ABSTRACTThe C-Band All-Sky Survey (C-BASS) has observed the Galaxy at 4.76 GHz with an angular resolution of 0${_{.}^{\circ}}$73 full-width half-maximum, and detected Galactic synchrotron emission with high signal-to-noise ratio over the entire northern sky (δ &amp;gt; −15○). We present the results of a spatial correlation analysis of Galactic foregrounds at mid-to-high (b &amp;gt; 10○) Galactic latitudes using a preliminary version of the C-BASS intensity map. We jointly fit for synchrotron, dust, and free–free components between 20 and 1000 GHz and look for differences in the Galactic synchrotron spectrum, and the emissivity of anomalous microwave emission (AME) when using either the C-BASS map or the 408-MHz all-sky map to trace synchrotron emission. We find marginal evidence for a steepening (&amp;lt;Δβ&amp;gt; = −0.06 ± 0.02) of the Galactic synchrotron spectrum at high frequencies resulting in a mean spectral index of &amp;lt;β&amp;gt; = −3.10 ± 0.02 over 4.76–22.8 GHz. Further, we find that the synchrotron emission can be well modelled by a single power law up to a few tens of GHz. Due to this, we find that the AME emissivity is not sensitive to changing the synchrotron tracer from the 408-MHz map to the 4.76-GHz map. We interpret this as strong evidence for the origin of AME being spinning dust emission.

ISSUES RELATED TO THE TERRITORIAL LOCATION OF THE MAIN EVENTS OF THE BATTLE OF ZHOVTI VODY IN 1648

The issue of determining the location of the main events of the Battle of Zhovti Vody in 1648 is considered. The Battle of Zhovti Vody, which changed the course of history not only in Ukraine and Poland but also in other European countries, is still poorly studied. There is no definitive answer to some key questions, such as the location of the « Urochishche Zhovti Vody», the place where the registered Cossacks joined Bohdan Khmelnitsky. Based on the analysis of sources and cartographic information, as well as a personal study of the area, the author draws conclusions about the location of the besieged Polish camp, the location of Kamenny Zaton. The author draws attention for the first time to special marks on one of the versions of the General Map of Ukraine by Guillaume Levasseur de Beauplan published by Willem Hondius in 1648, related to the Battle of Zhovti Vody. The study used a comparative analysis of historical maps and critical analysis of sources, regardless of the influence and authority of the authors. Identification and analysis of contradictions in the available empirical material led to the search for effective ways to eliminate them. As a result of the research, it became possible for the first time to locate the places of the main events of the beginning of the national liberation struggles of the Ukrainian people in the middle of the 17th century.

An enhanced version of the Gaia map of the brightness of the natural sky

The GAia Map of the Brightness Of the Natural Sky (GAMBONS) is a model to map the natural night brightness of the sky in cloudless and moonless nights. It computes the star radiance from the photometric data in Gaia and Hipparcos catalogues, adding the contributions of the diffuse galactic and extragalactic light, zodiacal light and airglow, and taking into account the effects of atmospheric attenuation and scattering. The model allows computing the natural sky brightness in any given photometric band for a ground-based observer, if appropriate transformations from the Gaia bands are available. In this work we present the most recent improvements of the model, including the use of Gaia EDR3 data, the inclusion of a wide set of photometric bands and the derivation of additional sky brightness indicators, as the horizontal irradiance and the average hemispheric radiance.

The Peculiarities of Ethnographic Images on the Maps of Kamchatka Expeditions

Purpose. The article considers the peculiarities of the images of the representatives of peoples of Siberia on the ethnographic maps of the First and Second Kamchatka expeditions, taking place in the first half of the 18th century.Results. Maps are an important historical source, moreover not only the cartographic information is studied, but also other materials located on the map. Three versions of the final map of the First Kamchatka Expedition, as well as the Ethnographic Map of Siberia of the Second Kamchatka Expedition are a valuable source for research. They contain images of representatives of different peoples and scenes from their lives. A comparative analysis of the drawings of Yakut, Tungus (Evenks), Koryak, Kuril, Chukchi, Kamchadal (Itelmen) was carried out, the features of images of clothing and objects were revealed, and ethnographic analogies were attracted. So, gradually, on different maps a fur coat on Yakut loses its fur trim, the bow becomes a crooked stick with a rope. On later maps, frames appear around the images, the number of representatives of the Siberian peoples increases.The maps are made by different mapmakers. The first of them was created in St. Petersburg, sketches made during the work of the First Kamchatka expedition were copied on it. Local mapmakers did not quite understand what they were depicting and, therefore, already at this stage there is a loss of part of the ethnographic meaning. The rest of the maps were already copied from the first one, so there is a further loss of ethnographic specificity, simplification of the pictures.The sequence of implementation of the maps was determined by increasing the number of images, the appearance of frames around them, and their gradual simplification. The earliest version of the final map of the First Kamchatka Expedition shows the summer camp of the Kamchadals under the cartouche. This is the most complete image, on the other sources only individual elements of this sketch were drawn. The ethnographic map of Siberia of the Second Kamchatka Expedition is the most complete in both cartographic and ethnographic contexts. But the greatest losses of the ethnographic specificity of the Siberian peoples are observed on it.Conclusion. As a result of the conducted research, the sequence of compiling versions of the final map of the First Kamchatka expedition (ethnographic version) was determined. The variant of the drawings of representatives of peoples when compiling the ethnographic map of Siberia of the Second Kamchatka expedition is revealed. A gradual partial loss of ethnographic information occurred when copying maps by different mapmakers who did not quite understand what they were depicting.

The new, LADM inspired, data model of the Dutch cadastral map

The Netherlands’ Cadastre, Land Registry and Mapping Agency – in short Kadaster – provides legal certainty about every piece of land (and water) in the Netherlands. Newly surveyed cadastral boundary geometry is documented in land surveying field sketches and processed in the nationwide cadastral map. Because of the different working methods since the start of cadastral surveying in 1811 (a nationwide cadastral map was available in 1832 when Kadaster was established) the map has a so-called graphical quality. The standard deviation of boundary points is 20 cm for urban areas and 40 cm for rural areas (in the national reference system), this implies that the geometric quality of the current map is insufficient for determining the exact parcel location in the field. With an increasing digitization and open data policy, multiple sources of information (including the cadastral map) are demanded to be accessible and usable by a wide range of users. This so-called geographical quality and its limitations leads to bottlenecks and incomprehension. This is the reason why Kadaster has started a program, the Cadastral Map Next program, aiming at the development of a methodology for the development of a new version of the cadastral map. The aim of this new version is that the location of boundaries is so accurate, that the boundary coordinates from the map are usable for a better approximation of the boundary location in the field and can accommodate future demands and developments. This development process is based on the use of the original field observations. For this purpose, almost all observations on all (historical) field sketches must be processed. There are about 5 million digitally archived field sketches. This is an enormous challenge that requires far reaching automation. The program has investigated whether it is possible to automatically extract the original (mostly handwritten) measurements from the field sketches and to combine this information and re-determine the location of the boundaries with a very high accuracy of boundary points. With the support of several companies, it has been possible to build a cadastral map with a known geometrical quality and verified accuracy. This accurate cadastral map is called ‘Reconstruction Map’, a working title for the cadastral map with known geometrical quality and higher accuracy. Once this map is ready and the involved parties agree, it will be introduced and presented as the ‘Cadastral Map Next’ and replace the current cadastral map. An important step in this process is to redesign the current data model from parcel level to the more specific boundary level to achieve an unambiguous connection between cadastral objects and its related survey data. A challenge in this process is that the current survey documents only describe changes in a parcel, thus different boundaries of a parcel are related to different survey documents. This challenge should be addressed in the new model. The new data model applies the sub-package ‘Survey and Representation’ of the Land Administration Domain Model (LADM), an ISO standard, for solid solutions in their design process. The basic structure of spatial sources, points, boundaries and parcels, all with their own identification, enables to store relevant data, like coordinates, quality descriptions and metadata, as attributes to these objects. Further new relations can be established while previous ones are maintained. The concept of the ‘Reconstruction Map’ and the ‘information layer’ (metadata) will bring new insights to establish new relations and so relate the different cadastral objects in a more dedicated way.

Coverage Optimization of Wireless Sensor Networks Using Combinations of PSO and Chaos Optimization

The coverage rate is the most crucial index in wireless sensor networks (WSNs) design; it involves making the sensors with a reasonable distribution, which closely relates to the quality of service (QoS) and survival period of the entire network. This article proposes to use particle swarm optimization (PSO) and chaos optimization in conjunction for the coverage optimization. All sensor locations are encoded together as a particle position. PSO was used first to make sensors move close to their optimal positions; furthermore, a variable domain chaos optimization algorithm (VDCOA) was employed to reach a higher coverage rate, along with improved evenness and average moving distance. Six versions of VDCOA, taking circle, logistic, Gaussian, Chebyshev, sinusoidal and cubic maps, respectively, were investigated. The simulation experiment tested three cases: square, rectangular and circular regions using nine algorithms: six versions of PSO plus VDCOA, PSO and other two PSO variants. All six versions showed better performance than PSO and CPSO, with coverage all exceeding 90% for the first two cases. Moreover, one version, PSO plus circle map (PSO-Circle), increased the coverage rate by 3.17%, 2.41% and 12.94% compared with PSO in three cases, respectively, and outperformed the other eight algorithms.