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Showing posts with the label Path Profile

053] How to Compare Terrain Changes Over Time in Global Mapper Using Path Profile

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Visualize and analyze elevation differences between two periods using multiple DEM layers. This tutorial demonstrates how to use the Path Profile tool to compare terrain data from different dates. By overlaying multiple Digital Elevation Models (DEMs), you can easily identify topographic changes and export analysis results for civil engineering or environmental monitoring projects. In this tutorial, we will compare terrain changes using two DEM (Digital Elevation Model) datasets and the Path Profile tool. The workflow is straightforward. You just need to turn on all the DEM layers you want to compare and then run the Path Profile tool. First, prepare two DEM files. img 1 : DEM data from 2024-12-01 img 2 : DEM data from 2025-01-01 Import both files into Global Mapper. img 3 : Global Mapper Control Center showing two loaded DEM layers Preparing Multiple DEM Layers for Comparison ...

051] How to Automatically Detect Site Boundaries in Global Mapper Path Profiles Using ChatGPT

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Use exported coordinate data to automatically detect project site ranges in terrain profiles. This tutorial demonstrates how to leverage raw X, Y coordinate data from Global Mapper CSV exports to help ChatGPT automatically identify and highlight project site boundaries on a cross-section graph, eliminating the need for manual range input. Continuing from the last session, I had more conversations with ChatGPT. It really feels like talking to a human. The Problem with Manual Site Range Input In the previous post, I manually designated the "site" area. In other words: img 1 : Intersection of the profile line and the project site boundary in Global Mapper As shown in the image above, I manually identified the range where the cross-section line intersects with the project site boundary and input that range when ChatGPT generated the graph. Using CSV Coordinate Data for Automation However, look...

050] How to Create Advanced Terrain Profiles from Global Mapper Using ChatGPT

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Export raw elevation data from Global Mapper to CSV and use ChatGPT to generate professional, high-fidelity terrain cross-sections. This tutorial demonstrates how to overcome the visual limitations of built-in GIS profile tools. By leveraging AI-driven Python scripting, you can create custom-shaded site areas, highlight steep slopes, and add precise leader-line annotations to your terrain analysis reports. Exporting Path Profile Data from Global Mapper Today, I’d like to share an experimental workflow for improving terrain profile visualization in Global Mapper. First, please run Global Mapper. img 1 : DEM created in Global Mapper with a line segment added for profile analysis With the DEM created, add a line segment. Now, let's extract the terrain profile. img 2 : Accessing Path Profile through the Analysis/Measurement menu After selecting the line segment, right-click and select Anal...

012] How to Calculate Elevation Gain and Slope for Line Features in Global Mapper

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Calculate detailed elevation gain, loss, and slope statistics along any line feature to analyze routes. This tutorial demonstrates how to use Global Mapper’s Analysis tools to calculate terrain statistics for road or path features. You will learn how to interpret cumulative elevation changes, 3D lengths, and how to optimize the Path Profile visualization for technical reporting. Preparing the Terrain and Road Data Today, we will learn how to extract terrain information using Line features . To follow along, please open the data file we used in the previous session. img 1 : Global Mapper screen showing the terrain, boundary, and road line from the previous session 1. Extracting Terrain Information for a Line The process is identical to the one we used for polygons. We will use the same tool to analyze the terrain along our "Road" feature. Select the Road line using the ...

004] How to Create Terrain Cross-Sections with Path Profile in Global Mapper

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Extract precise elevation data along a specific path to visualize terrain cross-sections. This tutorial covers the essential steps for generating a Path Profile in Global Mapper. You will learn how to use the Digitizer Tool to define a section line, organize layers for clarity, and troubleshoot common display issues caused by contour intersections to achieve a clean elevation graph. Today, we'll take a quick look at how the Path Profile tool works in Global Mapper. Since we are continuing from the previous lesson, you can open the same project file. img 1 : Global Mapper main screen with layer list showing terrain analysis layers Drawing the Terrain Section Line First, we need to draw the line where the terrain section will be generated. Select the pencil-shaped icon (Digitizer Tool) from the top icon menu. img 2 : Toolbar highlighting the Digitizer Tool (Alt+D) Right-click on the ...