Feature Description
The Merge DSM/DEM function integrates multiple DSM/DEM image datasets to eliminate potential data discontinuities or inconsistencies at boundaries. The merged single dataset covers broader areas, facilitating large-scale data processing, analysis, and sharing.
Available since SuperMap ImageX Pro 11i(2023) release.
Feature Entry
DSM Processing Window -> Merge DSM/DEM Node.
Parameter Description
| Parameter | Description | Type |
| Merge DSM Data |
Check this box to merge multiple DSM datasets. |
Boolean |
| DSM Data | Available when Merge DSM Data is checked. Displays the DSM datasets to be merged (non-editable). | DatasetMosaic |
| Merge DEM Data | Check this box to merge multiple DEM datasets. | Boolean |
| DEM Data | Available when Merge DEM Data is checked. Displays the DEM datasets to be merged (non-editable). | DatasetMosaic |
| Output Format | Uses the Output Format parameter from Set Image Path (DSM/DEM) (non-editable). | FileType |
| Compression Method | Uses the Compression Method parameter from Set Image Path (DSM/DEM) (non-editable). | CompressMethod |
| Output File Path | Uses the Processing Path parameter from Set Image Path (DSM/DEM) (non-editable). | File |
| Fill Void Holes | Uses elevation data from the workspace to fill nodata voids in the result. | Boolean |
| Create Image Pyramid | Enabled by default. Builds pyramids using specified resampling method to improve image display performance during zoom operations. | Boolean |
| Resampling Method | Available when Create Image Pyramid is checked. Default: Average. For more methods, see Resampling Method. | PyramidResampleType |
| Asynchronously Create Statistics | Applies stretch display based on statistics during image browsing. If no statistics exist, uses default stretch method (no stretch for 8-bit data). Enabled by default - creates statistics in background without blocking workflow. If disabled, statistics creation occurs during tool execution (may take longer). | Boolean |
| Repair Water Body Elevation | Automatically corrects water body elevation errors in results by reassigning elevation values. Water areas (low-texture regions) often have inaccurate elevation values in generated DSM/DEM. Disabled by default. | Boolean |
| Data Source Type | Available when Repair Water Body Elevation is checked. Options: Existing Data and Water Body Detection. | WaterBodyVectorSourceType |
| Data Source |
Available when Existing Data is selected. Specifies the data source containing water body zonal data. |
DataSource |
| Dataset |
Available when Existing Data is selected. Specifies the water body region dataset. |
DatasetVector |
| Multispectral Data Source |
Available when Water Body Detection is selected. Specifies the data source containing multispectral data. |
DataSource |
| Multispectral Dataset |
Available when Water Body Detection is selected. Specifies the mosaic dataset containing multispectral data. |
DatasetMosaic |
| Pixel Threshold |
Available when Water Body Detection is selected. Sets pixel threshold for water body extraction (default: 64). Areas with fewer pixels than threshold won't be extracted. |
Integer |
| Downsampling Factor |
Available when Water Body Detection is selected. Default: 1 - samples every nth row/column in n*m image for efficiency. Must be integer ≥1. Higher values speed up detection but reduce accuracy. |
Integer |
| Elevation Value | Specifies water body elevation. If empty, obtains elevation from DEM data. | String |
| Elevation Smoothing | When checked, smooths boundaries between water bodies and DSM data. If unchecked, directly updates water areas with specified elevation. | Boolean |
Output
Outputs merged DSM/DEM data.
Related Topics