Jpeg to DEM

MirandaOtto — Thu, 09 Oct 2014 00:52:28 GMT

Hi,

I started off with a jpeg from Google Earth and georeferenced the map in arcGIS using the following process:

How To: Add a Google Earth Satellite Image Into ArcMap | Introduction to GIS

From here, I would like to create a DEM so i can show contour lines. I know it is possible but can not seem to remember how to do it.

Thanks for your help!!

Re: Jpeg to DEM

XanderBakker — Thu, 09 Oct 2014 02:15:36 GMT

Hi Miranda

I hate to disappoint you, but when you georeference a satellite image in ArcMap, you still do not have the necessary data to generate a Digital Elevation Model. Have a look at this Wiki GIS article: Digital Elevation Model - GIS Wiki | The GIS Encyclopedia or this presentation that I created a while ago on Digital Elevation Models and their applications:Digital Elevation Models - WUR - Grontmij

There are however a lot of free DEM (or LiDAR) resource where you can download DEM data directly. To give you a few pointers:

Digital elevation model - Wikipedia, the free encyclopedia

http://nationalmap.gov/elevation.html

Free Satellite Data - TERRAINMAP Satellite Image Analysis

USGS SDTS format Digital Elevation Model data (DEM)

Lidar Links of Use in Mapping

EarthExplorer

Kind regards, Xander

topic Jpeg to DEM in ArcGIS Hub Questions

Jpeg to DEM

Re: Jpeg to DEM