Abstract
The service efficiency of traditional WebGIS model has certain limitation in providing geographic information service. To improve the cutting efficiency and updating convenient of the map tiles and the user interoperability of accessing to and splicing tile map, in the C/S mode, according to the characteristics of data organization of tile map and the shortcoming of traditional accessing to and splicing tile map, the method is proposed by combining ArcGIS Engine with jointed map framework to realize tile map cutted, drawn and projected dynamically. And the method is demonstrated the feasibility through the Hunan basic geographic data.
Highlights
Online maps such as Google Map, BaiduMap and BingMaps is characterized by easy operation, friendly interface, smooth accessing and data plentifulness and favored by users (Wei, 2012)
The tile map generally created by using ArcGIS Server, but this way will make it difficult to update the local area of tiles and have a high cost; besides, the Flash is used as client to cut map dynamically (Zhao and Sun, 2010; Zhang, 2009), but this method can bring some burden to the client and make the program to reduce the efficiency
The accessing to tiles usually by Flex, Silverlight, OpenLayers, MapEasy, GDAL manners, such as city planning information system uses the Win 32 class library and open source library GDAL mosaic tiles (Wei, 2012); East China Geological and geochemical database system using the Ajax and MapEasy to access tiles (Ma et al, 2008); Longxi County geographic spatial information application system based on Flex (Gao et al, 2011); The BingMaps tiles data was be used to realize the Web Map Service (Wang et al, 2010); those ways have some advantages on accessing the mosaic tiles, but have some limitation on other analytical function developments
Summary
Online maps such as Google Map, BaiduMap and BingMaps is characterized by easy operation, friendly interface, smooth accessing and data plentifulness and favored by users (Wei, 2012). The accessing to tiles usually by Flex, Silverlight, OpenLayers, MapEasy, GDAL manners, such as city planning information system uses the Win 32 class library and open source library GDAL mosaic tiles (Wei, 2012); East China Geological and geochemical database system using the Ajax and MapEasy to access tiles (Ma et al, 2008); Longxi County geographic spatial information application system based on Flex (Gao et al, 2011); The BingMaps tiles data was be used to realize the Web Map Service (Wang et al, 2010); those ways have some advantages on accessing the mosaic tiles, but have some limitation on other analytical function developments Such as the complication of the accessing to database of Flex and Silverlight and the difficulty of advanced functional analysis developments, the low efficiency of GDAL accessing, the function of MapEasy is little it is easy to call the method only to write the read address, the function of OpenLayers is so rich while it is hard to call methods; using BingMaps tiles data directly can reduce cost, but the content of the tiles data can’t be changed at random. Aiming at these disadvantages, such as the complexity of local update by ArcGIS Server, the low efficiency of cutting tile map program on the client by using Flash, the less function of accessing to and splicing tile map by using MapEasy and the low efficiency of GDAL, this study development a dynamic till-cut and access splice tool based on ArcGIS Engine
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