TdhGIS

Feature Summary:

• Graphically create and edit geometric data
• Import Shapefiles and OpenStreetMap data
• Use raster images as background and a CAD drawing as an overlay
• Transform coordinates based on the Proj4 library.
• Color polygons based on user data values using either discrete intervals or gradients
• Allocate point data to user specified buffers for points, polygons and multilines
• Allocate point data to polygons.
• Allocate polygon data to other polygons.
• Create thiessen polygons.
• Create data contours.
• Create contour polygons.
• Calculate the area and perimeter of irregular polygons, including exclusion polygons.
• Data is stored in an open database allowing manipulation by other software