Abstract
The principles of the future European Directive on Spatial Data Infrastructures inspire the new Spanish Information System on Land Occupation (SIOSE), where the information from the various existing landcover/landuse maps will be integrated, including that of the Forest Map of Spain (MFE). This work describes a test commissioned by the Nature Database Department of the Ministry of Environment, whose goal is to evaluate the possibility of semiautomatic updating, by means of an image segmentation algorithm developed by the author, of MFE polygon edges. The updated map may be used later to represent forest areas in SIOSE. The result, although needs to be confirmed by further tests, is very positive, because more than 80% of the edges of the final map come from the automatic segmentation, which may represent more than a 40% time-saving in the photointerpretation.
Highlights
The principles of the future European Directive on Spatial Data Infrastructures inspire the new Spanish Information System on Land Occupation (SIOSE), where the information from the various existing landcover/landuse maps will be integrated, including that of the Forest Map of Spain (MFE)
This work describes a test commissioned by the Nature Database Department of the Ministry of Environment, whose goal is to evaluate the possibility of semiautomatic updating, by means of an image segmentation algorithm developed by the author, of Mapa Forestal de España (MFE) polygon edges
The result, needs to be confirmed by further tests, is very positive, because more than 80% of the edges of the final map come from the automatic segmentation, which may represent more than a 40% time-saving in the photointerpretation
Summary
SCRM (Size Constrained Region Merging, Castilla, 2003, 2004, 2005; Castilla et al, 2004, 2006), es una herramienta que genera de forma automática, a partir de una ortoimagen digital, una capa vectorial (en formato ESRI shape -.shp) de polígonos similar a la que delinearía un fotointérprete al que se le diera la tarea de dividir la imagen en un cierto número de recintos, que posean una apariencia uniforme su interior y un aspecto diferente del de su exterior, y que superen todos ellos un cierto tamaño mínimo. La herramienta tiene una interfaz de usuario en la que éste puede introducir las restricciones de tamaño (mínimo, medio y máximo) para los polígonos de la capa de salida, que en adelante se llamarán segmentos para diferenciarlos de las teselas finales del MFE.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
