Creating an image service with a signed 16-bit dataset
When creating an image service definition using a signed 16-bit dataset as input data, sometimes incorrect minimum/maximum values result. Therefore, when adding data that contains a signed 16-bit integer pixel type, it is recommended that you convert the pixel type process from 16-bit to floating point on the Raster Properties dialog box and change the pixel type process from floating point to 16-bit on the Service Properties dialog box.
This workflow will help you to create a service for datasets containing signed 16-bit integer as the pixel type.
Create an image service definition
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Use the Advanced option to create a new image service definition.
- Open ArcMap.
- Click the Image Service drop-down menu on the Image Service Definition Editor toolbar, point to Advanced, then click New Service Definition.
- Type the path and name in the Service definition text box, or click the browse button to navigate to the location and provide a name.
- Click the Spatial reference browse button and choose a spatial reference file for either a geographic or projected coordinate system.
- Click the Service type drop-down arrow and click Custom.
- Change Number of bands to 1.
- Change Pixel type to Signed 16 bit integer.
- Change Color space to Grayscale.
- Click OK to create the new image service definition.
The new image service definition is added to the table of contents as a customized group layer.
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Use the Advanced option to add raster datasets.
- On the Image Service Definition Editor toolbar, click the Image Service drop-down menu, point to Advanced, then click Add Raster Dataset to open the Select Raster Type dialog box.
- Use the Select Folder option to add the raster datasets.
- Click the Image Service drop-down menu on the Image Service Definition Editor toolbar, point to Advanced, then click Build.
- Build the image service definition with the default options.
- Click OK.
Add the Convert Pixel Type process to the raster properties
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Select the raster and open the Raster Properties dialog box by clicking the Raster Properties button
on the Image Service Definition Editor toolbar.
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Click the General node.
- Change Pixel type to 32-bit floating-point.
- Change Bit depth to 32.
- Change Color space to Unknown.
- Click the Rasters node.
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Click the Processes tab.
- Add the Convert Pixel Type process to the Processes Selected list.
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Click the Edit button
to change the required process parameters.
The Convert Pixel Type Process Definition dialog box is displayed.
- Click the method 16 bit to floating point.
- Click Apply and close the dialog box.
- Click Apply and close the Raster Properties dialog box.
Add the Convert Pixel Type process to the service properties
-
Open the Image Service Properties dialog box (from the Image Service Definition Editor toolbar
).
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Click the Service Definition node.
- Change Number of bands to 1.
- Change Pixel type to 32 bit floating-point.
- Change Bit depth to 32.
- Change Color space to Unknown.
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Click the Service Process node.
- Add the Convert Pixel Type process to the Processes Selected list.
-
Click the Edit button
to change the required process parameters.
The Convert Pixel Type Process Definition dialog box is displayed.
- Click the method Floating point to 16 bit.
- Click Apply and close the dialog box.
- Click Apply and close the Image Service Properties dialog box.
Zoom or pan around and you can see the created service with a 16-bit signed dataset.
![Hinweis Hinweis](rsrc/note.png)
It is recommended that you adjust the Stretch parameters in Raster Properties when a service created with 16-bit imagery appears black.