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Create Geologic Cross Sections--eXacto Section v. 1.2, ArcMap 9.3



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Author jennifer carrell
File Name x_section_tool_v1.2.zip
Language Visual Basic
Last Modified Jun 22 2009
Status of work Other Copyright/License
Software ArcGIS - ArcInfo
File Size 288.88 kb
Downloads 2101

ArcScripts is intended for the free exchange of scripts and tools related to ESRI software products. Please alert the moderator if this script is a demo, trial-version, or an advertisement for a retail product.

Summary
The downloadable zip file contains an .mxd, and user guide. A tutorial document and tutorial data are available by downloading the previous version of this tool:
http://arcscripts.esri.com/details.asp?dbid=15806

An ArcInfo license and 3D Analyst extension are required.
The objective of this program is to use GIS to draw important parts of the cross section precisely: the surface profile (using a DEM), the geologic units and their contact points on the surface, the location of wells/boreholes, and the geologic materials found at the well location, projected as a line into the subsurface. The output is a combination of polyline and point shapefiles. One of the advantages of this program is that the output features have a spatial reference, meaning that, when set to the desired map scale, the cross section measurements will always be correct. The geologist can use these as a guide to “connect the dots” when drawing the subsurface contacts. He or she can choose to finish the cross section digitally in ArcMap or export it to a graphics program.

Visual Basic for Applications (VBA) was used to develop the program within ArcMap. Code is stored in the .mxd. The user provides input data: lines of cross section, an elevation raster, geology polygons, well points, and a table with subsurface data. The user defines a sampling interval and vertical exaggeration. The program will convert between feet and meters, depending on the units of the input data. A button control launches a form that obtains the required inputs. The user can choose which outputs he or she wants. The output layers are automatically symbolized and labeled in a new data frame.


09/09/08: Fixed a couple of bugs related to canceling out of the well and depth forms.
02/19/09: Edited user guide in documentation.
06/17/09: New version saved in 9.3. Added a cancel button to first form. Added error handling for when zero points are within tolerance of cross section line.
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