For a measurement comparison in reference to your existing survey dataset, you can choose to add your data as a Design Surface or KML Overlay.
Design surfaces are elevation grid data in geoTIFF format converted from a .DWG /.DXF file. This is normally generated from contours or TIN surfaces. They are treated as a separate dataset in a site.
• How it works
When uploaded into the platform, elevation values can be viewed by enabling the Contour/Heat Map.
This type of data overlay allows you to make measurements in comparison to other data. For a more detailed guide on how to use the Volume Comparison tool to compare a survey dataset to a Design Surface, refer here.
• How to create a design surface
This article provides a step-by-step guide on how to convert any .DWG/.DXF file into a geoTIFF format using QGIS.
KML overlays are mainly used to view planimetric features overlayed in the 3D model. You can also used them in querying for elevation data. Think lineworks or a road plan or building outline—or other land cover features. They can be overlayed in a dataset in site.
• How it works
When uploaded into the platform, the layer can be viewed by enabling the it on the left side of the Layer Pane.
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