Contour Map from DEM file

Prerequisite Software: ArcGIS 9.3

  1. Download the required DEM file from DEM Datasources. One of the datasource for DEM files is databasin. For following example, I downloaded Asia DEM file.
  2. Extract Portion of DEM Geoprocessing in ArcMap.
    1. Open new empty map in ArcMap.
    2. Drag and drop your DEM file from ArcCatalog to ArcMap. In my case, the dem file is 000asia_dem.
    3. Open ArcToolbox from icon on Standard Toolbar in ArcMap or from Windows>ArcToolbox.
    4. In ArcToolbox, click Spatial Analysis Tool > Extraction > Extract by Rectangle. In my case, I have entered following coordinates:
      • left = 70.59
      • right = 73.064
      • top = 34.849
      • bottom = 32.525
    5. Select aisa_dem in inputraster dropdown box.
    6. Browse to your given folder in output raster box and press ok. Also enter the name of the file to save. In my case it is surveydata.
    7. Extracted DEM will be created as new layer.

  3. Create Contour from DEM file.
    1. Open new empty map in ArcMap.
    2. Drag and drop the extracted DEM file from ArcCatalog to ArcMap. If it ask to create pyramids for dem file, press yes.
    3. Open Spatial Analyst Toolbox from right click on empty space of Standard Toolbar or goto view > Toolbars>Spatial Analyst.
    4. Goto Spatial Analyst > Surface Analysis > Contour
    5. Select in input box the given DEM layer.
    6. Set the Contour Intervals or keep the default values.
    7. Select the Output folder for Feature and give name to the shape file. In my case the name is surveycontour.shp. Press ok.
    8. A contour file will be created as new layer.

You can check the dem2contour poster for demo.