Get Elevations

Summary

Extracts values from a raster elevation source to the collar feature class of a drillhole dataset. Creates a new field containing raster values for each collar location, or overwrites selected collar elevations (Z locations) with values from an elevation raster.

Usage

The Get Elevations tool supports two modes of use. You can use it to get elevations for:

  • specific drillhole collars - use this option to select certain drillholes and replace their elevations values with the values from the selected elevation source. Sometimes, imported drillhole data will have some missing or incorrect elevation values for the drillhole collars. If this happens, the drillholes can appear to be above or below the topography in 3D scenes.
  • all collar locations (as new field) - use this option to extract values for every collar location from the selected elevation source. Use this mode to view the elevation values from a raster at each of the collar locations in order to confirm the collar elevation accuracy, or in the case of geophysical or geochemical datasets, extract values from any raster that exist at each drillhole location.

Parameters

Parameter Explanation Data Type

Get elevations for

Choose the mode to use for getting elevation values.

  

Select holes to replace elevations

Selected drillholes will have their collar elevation values replaced by the values extracted from the raster dataset.

  

New field name

Specify a name for the field in which elevation (or raster) values will be saved.

  

Elevation source type

Select the elevation source type: 

  • Raster - the elevation values are extracted from a raster dataset that must reside in a geodatabase.

  • World elevation service - the elevation values are retrieved from the ArcGIS cloud hosted Image server:https://elevation.arcgis.com/arcgis/rest/services

  

Elevation raster source

Browse to select a raster dataset in a geodatabase to extract elevation values from.

See Technical Notes below for more details.

Raster dataset

Confirm existing elevation
data will be overwritten

Check this checkbox to confirm that you intended to replace the original elevations with new values from the elevation source.

When specific collars are updated with new elevations, the affected drillholes will be resurveyed to ensure that location of the subsurface data is correctly adjusted to use the new elevation values.
 

Technical Notes

Elevation Source

The elevation source must be a raster dataset in a geodatabase. Use the Import Geosoft Grids tool if you have elevation data in Geosoft Grid file format, or use the Find Geoscience Data option to obtain free elevation data for the project area. Note that the Get Elevations tool can be used to extract values for any type of raster data (e.g. geophysical or geochemistry values) to the collar feature class, if desired.

Related Topics

 

Got a question? Visit Seequent Forums or Seequent Support