Digital Geography

Possible application for topologies

Most of my students asked me: “why do we need this or that!?”. In fact: for topologies I failed in answering often. One possibility of usage is shown here: In fact I was confronted with this problem more then once: two neighbouring polygons, move one, move the other and hope that snapping will do the rest. Using the topology tools in ArcGIS makes this much easier as it treats your shared vertexes as one vertex and adjust the geometry of both polygons… “Thumbs Up!” for that! Find more informations on topology here: LINK

Geodatabases: a little insight

Most GIS-users I know don’t use Geodatabases. But as your project may grow, participation and co-working gets more and more usual in your projects and you would like to share not only your results but also your data the usage of geodatabases will be one thing to keep in mind. Normaly each feature or raster is stored in separate files and maybe folders as well. This concept will stay alive in a geodatabase but in a more professional way: ArcGIS gives you the possibility to store your features in a file geodatabase, perosnal geodatabase or an ArcSDE Geodatabase. So what…