I have encountered a challenge while attempting to merge #bathymetry data collected in the field with #LiDAR data.
Firstly, when attempting to create a merged terrain using Ras mapper, the tool does not seem to generate the desired merged output Terrain. I would greatly appreciate any suggestions or alternative approaches you may have in achieving the successful merging of these datasets using Ras mapper or other software options.
Secondly, there is a noticeable shift of approximately 10ft between the bathymetry data and the LiDAR data. This misalignment poses a challenge in creating an accurate and cohesive merged dataset.
Thank you in advance for your assistance, and I look forward to your valuable contributions.
Ras Mapper is a 3D visualization software for LiDAR data developed by the US Army Corps of Engineers. To merge bathymetry and LiDAR data in Ras Mapper, follow these steps:
1. Import the bathymetry data into Ras Mapper: Go to the "File" menu, select "Import," and then choose "Bathymetry" from the available formats. Follow the import wizard to select the correct input file format and data parameters.
2. Import the LiDAR data into Ras Mapper: Go to the "File" menu, select "Import," and then choose "LiDAR." Follow the import wizard to select the correct input format and data parameters.
3. Change the display mode to "Layer Mask": Go to the "View" menu, select "Display Mode," and choose "Layer Mask" to view the merged data.
4. Set the elevation datum: Right-click on the "LiDAR" layer, select "Elevation Model Properties," and set the correct vertical datum.
5. Merge the data: Right-click on the "Bathymetry" layer, select "Merge Data," and choose the "LiDAR" layer from the drop-down menu. Follow the wizard to set the merge parameters, such as the merging algorithm, resolution, and input/output extents.
6. View the merged data: Once the merge is complete, switch the display mode to "Layer Mask" to view the merged data. If necessary, adjust the display properties, such as transparency, color ramp, and contour interval, to make the merged data easier to interpret.
By following these steps, you can merge bathymetry and LiDAR data in Ras Mapper to create a combined 3D terrain model that incorporates both land and offshore topography.
thank you for your comprehensive answer Jude Paho Nteinmusi . Honestly, in Ras Mapper I do not have any option called "Layer Mask". Even in file menu, I do not have "import". I used the Ras Mapper window, click right on Terrain and then choose "Create new Ras Terrain". I am using version 5.0.7 or 6.0
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