In geologic modeling we generally consider the azimuth, or bearing, which is denoted \(\alpha\). A single angle may be used to describe the rotation. Orienting an object or coordinate system is substantially easier in 2D than in 3D. The underlying principles explained here will also allow for modelers to transform between different conventions. This lesson will use and explain the conventions behind the GSLIB (Deutsch & Journel, 1998). This lesson will explain how the most common kinds of parameters operate, and the mathematics behind them so that geologic modelers can efficiently and accurately specify orientations. Correctly orienting objects in 3D is a difficult task, due primarily to cryptic parameters and many different conventions. Experimental variograms are calculated in particular directions of interest, search ellipsoids for kriging and simulation are oriented along directions of geologic continuity, and even the underlying coordinate system may be re-oriented for modeling efficiency. When performing geologic modeling it is necessary to orient anisotropy in three dimensional space. Transform between different rotation conventions.Understand the mathematical formalism of Euler angles in 3D space.Describe the orientation of search ellipsoids and variograms using GSLIB angle conventions.
#Surpac lesson software
The Angle Specification for GSLIB Software Matthew Deutsch The Angle Specification for GSLIB Software. If the raster dataset is added from Catalog without the multipatch feature class, the raster dataset will not appear in the correct location since this is relative to the section orientation and origin. By displaying the feature class together with the raster dataset, the original location, orientation and appearance of the section raster is maintained.Īccess MyGeosoft Support > for online support and learning resources: Knowledge Base Articles, Guided Learning Path Lessons, Instructional Videos, Technical and Technology Papers, and Best Practices.Cite this lesson as: Deutsch, M. If the active pane is a map window, section oriented rasters will appear as a polygon outline of the raster locations only. To view sections correctly, add them to a 3D scene.
#Surpac lesson pro
If the active map in Target for ArcGIS Pro is a 3D scene, the section raster datasets will appear at their correct locations and orientations in the scene. The feature class contains the outline of the section raster location, while the raster dataset created (and denoted by a "_RasterData" suffix) will contain the image of the original raster data. On conversion, a feature class is created to store the position and orientation of the vertical or inclined raster so that the section will appear at the correct spatial location in 3D.
vertical or inclined rasters) that have been "oriented" in a Geosoft software, the 3D location and orientation will be maintained during the import, provided the GI file is present. When converting section oriented grids (i.e. Technical Notes: Converting section oriented grids: The output geodatabase in which to store the new raster dataset(s). Unchecked - The imported raster(s) will not be displayed in the current map or scene. This determines if the incoming rasters will be displayed into the current map or scene window:Ĭhecked - The imported raster(s) will be displayed in the current map or scene. Unchecked - The existing raster dataset(s) will not be overwritten If any of the Geosoft grids to be imported already exist in the output geodatabase, this determines if they will be overwritten, or not:Ĭhecked - The existing raster dataset(s) will be overwritten See the Technical Notes section below for more details on importing section oriented grids.The input Geosoft grid file(s) to import.
Learn more about grids and coordinate systems in About Geosoft Grids. Note that the coordinate system information is stored in a GI file (.gi) that accompanies a Geosoft grid a grid's GI file shares the same file name as the grid. The output raster dataset will acquire the input grid's coordinate system, if one was defined in the input grid. If several grids are imported, the new raster datasets will all be created in the selected geodatabase and will all have the same spatial reference. You can select a single grid, or several grids to import. Usageĭuring the import, the Geosoft grid is converted to an Esri raster dataset: the new raster dataset, identical to the input grid (which remains unchanged), is created in the selected geodatabase. Section oriented grids can also be imported so that they appear in their correct locations in 3D scenes. This tool can be used to import multiple Geosoft grids into separate raster datasets. Imports one or more Geosoft grids (.grd) into raster datasets in a geodatabase.