Week 13 - Geographic Info Systems

Learning georeferencing is kind o neat. Watching the computer program line up the polygons with the picture is neat. I can stand on the top of a tall building in my town and use georeferencing to put it on global map. 

On my first image I thought this georeferencing thing was easy. The first image I attempted to reference it only took me 3 points and I had a zero root mean square error. The second wasn’t quite as simple, but that’s why it pays to read all of the instructions more than once.  After vigorously adding 17 points in attempt to get my map aligned correctly I noticed a little note about 2nd order polygon. All of a sudden it was like magic.

 

 Then we used the data from this map I then used ArcScene to take the polygons and line features from the map above and create a 3D map.

 Raise the height of the images above a the DEM image, exaggerate the features and you get a 3D image.