TdhGIS - Vector based Spatial Analysis

(runs on any Linux or MS Win computer)

Note to Users: Downloads (no ads, no bots, no limits, no charge) TdhGIS_linux for Linux TdhGIS_win for MS Windows TdhGIS_Library Downloads last updated May 17, 2012  for Vector Graphics  Editing,  see TdhCad.com  NEW=> for Shortest Path Analysis, see TdhGISnet The purpose of TdhGIS is to perform spatial analysis of data based on vector defined geometric data. This may include: 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 (e.g. find all gas stations within 1 mile of a highway). Allocate point data to polygons. (e.g. assign structures to hydrological basins). Allocate polygon data to other polygons. (e.g. allocate population data by census block to political boundaries). Create thiessen polygons (e.g. for all hospitals within a state, define the areas where a particular hospital is closer than any other). Create data contours (e.g. create lines of equal ground elevation based on a set of elevation points). Create contour polygons (e.g. define the area where average rainfall exceeds a selected value based on weather station data). Even if you don't yet need these easy to use spatial analysis operations, TdhGIS makes a very good Shapefile viewer and editor! Screenshot About the author; Tim Hirrel (timhirrel@tdhgis.com)