Analyze viewshed (geoprocessing)
Calculate a viewshed using a geoprocessing service, in this case showing what parts of a landscape are visible from points on mountainous terrain.
A viewshed is used to highlight what is visible from a given point. A viewshed could be created to show what a hiker might be able to see from a given point at the top of a mountain. Equally, a viewshed could also be created from a point representing the maximum height of a proposed wind turbine to see from what areas the turbine would be visible.
Tap the map to see all areas visible from that point within a 15km radius. Clicking on an elevated area will highlight a larger part of the surrounding landscape. It may take a few seconds for the task to run and send back the results.
- Create a
GeoprocessingTaskobject with the URL set to a geoprocessing service endpoint.
- Create a
FeatureCollectionTableobject and add a new
Featureobject whose geometry is the viewshed's observer
- Make a
GeoprocessingParametersobject passing in the observer point.
- Use the geoprocessing task to create a
GeoprocessingJobobject with the parameters.
- Start the job and wait for it to complete and return a
- Get the resulting
- Iterate through the viewshed features to use their geometry or display the geometry in a new
geoprocessing, heat map, heatmap, viewshed
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