Elevation Extractor
- Abraham Toribio II
InfoSewer's elevation extractor, as the name implies, extracts rim elevation of manholes and outlets from digital topographic maps such as the DEM thus simplifying the effort it takes to create this data. The elevation extractor interpolates ground surface elevations for the nodes in the drainage system from digital maps of various formats including vector data, raster data, and spot elevation data and other digital contour data formats compatible with ESRI. Based on the notion that the commonly available elevation maps are for ground surfaces, not for invert elevations of nodes, the invert elevation saved to InfoSewer's node database by the elevation extractor is the ground surface elevation interpolated from the digital map for the node less the maximum depth of the node. In other words, before running the elevation extractor, it is desirable for the modeler to enter maximum depth data for the nodes in the collection system.
To run the Elevation Extractor, proceed as follows.
Initiate the elevation extractor editor shown below from InfoSewer's Tools menu.
From InfoSewer Control Center Toolbar, click on InfoSewer button
Select the Tools Menu, and click on the Elevation Extractor.
Select the Source Data Format - This refers to the format of the digital topographic map (contour map) that contains elevation information of the collection system. InfoSewer accepts Raster Data Formats, Vector Data Formats, Spot Elevation Data Formats (i.e., Point Elevations).
Specify the source of the digital map, i.e., the Source Layer. Note that, you must load the digital map to the InfoSewer project as a layer before you run the elevation extractor.
Specify name of the data field that contains the elevation information, i.e. the Elevation Source Field.
If you wish the invert elevation extracted only for data elements in a domain, check the Apply To Domain Only box.
Finally, You may click the Extract button to run the elevation extractor, or the Close button to close the editor.