Global Mapper 20.1 Assignment of two different elevations to line data defined by two nodes
In Global Mappe 20.1 I have 2 elevation grids which I am attempting to use to assign the elevation of grid 1 to node 1 of a line layer and elevation of grid 2 to node 2 of the line layer. When I select node 1 and assign elevation from grid 1, both node 1 and node 2 inherit the elevation from grid 1. I can split the line and treat the nodes as points to assign different elevations and then export the points and parse back together in a text file, however this is a lot of extra work for a task that would seem simple. I also struggle to copy the "elevation" to a new attribute name for each line. Does anyone have experience accomplishing this task using fewer steps?
Answers
-
Hi There. What I do is CROP the uppermost grid to a polygon that cuts through the various lines that I'm working on and then using VERTEX EDITING command apply elevation from Grid 1 to Vertex 1 and elevation from Grid 2 to Vertex 2 and so on. Simple and effective.
See attached screen grab with Cropped Grid 1 shaded in Grey and underlying grid 2 shaded in green with line crossing boundary between both grids. -
P.S. Once you are done editing your lines don't forget to "un-crop" your uppermost grid!
Categories
- 12.9K All Categories
- 5.7K Features Discussion
- 346 Downloading Imagery
- 1.3K Elevation Data
- 385 Georeferencing Imagery Discussion
- 645 GM Script Language
- 54 User Scripts
- 115 GPS Features
- 419 Projection Questions
- 831 Raster Data
- 1.4K Vector Data
- 6.6K Support
- 180 Announcement and News
- 928 Bug Report
- 561 SDK
- 1.2K Suggestion Box
- 3.7K Technical Support
- 576 Other Discussion
- 132 GIS Data Sources
- 27 Global Mapper Showcase
- 243 How I use Global Mapper
- 108 Global Mapper Forum Website