Display a raster on a map and apply different rendering rules to that raster.
Use case
Raster images whose individual pixels represent elevation values can be rendered in a number of different ways, including representation of slope, aspect, hillshade, and shaded relief. Applying these different rendering rules to the same raster allows for a powerful visual analysis of the data. For example, a geologist could interrogate the raster image to map subtle geological features on a landscape, which may become apparent only through comparing the raster when rendered using several different rules.
How to use the sample
Open the sample and use the picker to select a rendering rule.
How it works
- Create an
ImageServiceRasterusing a URL to an online image service. - After loading the raster, get its
serviceInfoto get a list ofRenderingRuleInfosupported by the service. - Choose a rendering rule info to apply and use it to create a
RenderingRule. - Create a new
ImageServiceRasterusing the same image service URL. - Apply the rendering rule to the new raster.
- Create a
RasterLayerfrom the raster for display.
Relevant API
- ImageServiceRaster
- RasterLayer
- RenderingRule
About the data
The CharlotteLAS image service contains 9 LAS files covering Charlotte, North Carolina’s downtown area. The LiDAR data was collected in 2007. Four raster rules are available for selection: None, RFTAspectColor, RFTHillshade, and RFTShadedReliefElevationColorRamp.
Additional information
Image service rasters of any type can have rendering rules applied to them; they need not necessarily be elevation rasters. See the list of raster function objects and syntax for rendering rules in the ArcGIS REST API documentation.
Tags
raster, rendering rules, visualization