To reconstruct that palaeo-surface in actual space, I need to subtract the SBP thickness from the depth surface (bathymetry). I can do it for individual profiles (generated by GM Path Profile and processed in Adobe Illustrator) and attached below - but I want to be able to do so for the entire area of many square km that would require hundreds of such transects. The example shows greatly exaggerated profiles across the subject area: 1. seafloor (depth); 2. isopach (thickness of unit). Vertical and horizontal scales and exaggeration factor are the same in both profiles.

Thanks!

Does anyone know the correct procedure for reclassifying values for a GMG?

I’m working with a change-detection raster created by subtracting two DEMs. My goal is to calculate cut-and-fill volumes along line segments to analyze erosion and deposition. I’m using the volume calculation tool with a 10 m corridor around the line and a sample spacing of 0.30 m × 0.30 m in the X and Y directions. All vertices have a base height of 0 m.

The issue is that the raster has a lot of noise within the –0.30 m to +0.30 m range. I assumed these values would be excluded because I applied a custom shader that hides values within that range, but the shader settings don’t seem to affect the volume calculation—the tool still uses the full range of values. The volume tool allows setting X and Y sample spacing, but not Z.

What is the proper way to reclassify or filter out small elevation changes before running the volume calculation? Raster reclassification?

My goal is to calculate volumes at a sample spacing of 0.30m in the x, y, and z axis .

Thanks GM forum.

In the X-Y plane, the functions such as Copy/Paste to new layer, Move Mesh Feature and Rotate about the selected vertex all work fine.

However, none of the vertical re-positioning options have any effect. Entering an Offset to Z/Elevation doesn't complain but doesn't stick. Creating a new attribute with the desired new elevation and configuring in either the Feature itself or the Layer to get the new Elevation heights from that attribute for either Absolute or Model Height doesn't change anything.

Whatever is tried the vertices Z values remain permanently fixed at the original value, and the models only ever position at either the original elevation sitting under or over the terrain at the new locations or uses that value as an offset to the ground level so sits way above the terrain at the new location.

Am I missing something in the tools, or is this a bug, or is locking the mesh Z value actually a feature?

At the moment I'm travelling and limited to V25.1.

I have generated a TIN as an vector layer. Is there a way to set maximum triangle length? Or to find the triangles by length and then delete them?

I am new to global mapper, I have the elevation data from drone Lidar survey. I would like to know how to create multiple bench along the hill side excavation with certain parameter (slope, with and heigh of benches). I check along the flatenned the site plan but could not find the way of benches in the hillside. Please help me how to create the benches.

Is there a way to control the output resolution for "Calculate Flattened Site Plan Grid from Selected Area(s)"?

I am calculating some filed of view area using this tool and I would like to create areas from output elevation grids. The resolutions seems to be connected to the length of area used in computation as you can see in the print attached. Base DTM is 10m pixel.

Thanks,

R

If there is any method to classify the text by range and then I can got the text classified with co

diffrant colours as well

regrds

If we could obtain a “grid” of ground truthing points across the lake, would Globalmapper be able to “fit” our existing lidar surface to the grid of points using the “Lidar QC/Compare/Adjust” function? What would be an appropriate grid size for the software to use ( would 1,000-feet x 1,000-feet be sufficient)? I have V25Pro and noticed that version 26 there are a couple more options (Fixed Z Shift and Best Fit Plane). Any suggestions would be helpful. Thanks.

It provides the URL for the service endpoint as https://ws.geoservices.lrc.gov.on.ca/arcgis5/rest/services/Elevation/Ontario_Provincial_Digital_Elevation_Model/ImageServer

When I try to add it, it doesn't work. I tried both ESRI REST options, though I am pretty sure it would as raster tiles given that it is a digital elevation model.

i'd like to add a grid (30m x 30m) to a siteplan but not in terms of lines, but with just the height values (one of them highlighted in the screenshot). The base data is available as raster (DTM) and also vector (pointcloud) data. The height value displayed should match the position (every 30m).

What would be the most elegant and straight forward approach in your eyes?

Thanks in advance.

Alex

I’m working with slope data in Global Mapper. I’ve successfully converted my elevation data to a slope map using the shader, so I now have a raster layer showing slope values.

However, I’m stuck on the next step:

How can I create a profile path or extract the slope values along a line (e.g., a transect or road)?

My goal is to either generate a profile showing slope values along the line, or at least extract the slope values that intersect with the line for further analysis.

Any guidance or step-by-step help would be greatly appreciated!

Thanks in advance.

I have always have the following problem to some point, without finding why GM reacts this way.

I have a DTM loaded, as well as the orthorectified image. In the example below, image resolution is 25 cm/pixel (on the left), and the resolution3D view is not only degraded, the pixels are seriously deformed (even though the scale is 1x1). Vector files are not properly scaled either; the big orange dot on the right is a tiny orange dot symbol of size 2 which you can see in the middle of the orthorectified image.

I have tried many options in the 3D configuration menu, changing window size etc. and this does not change anything, the 3D view is just hopeless. There is no other raster layer loaded. I have far enough RAM (64 Gb). GM version is 26.0 but this has been a problem to me since the beginning of times. What could the reason be?

I thought that it might be related to file size. The DTM and the orthorectified image are 1.2 Gb each, and 10,000x30,000 pixels. However, if file size is the limitation, would it explain that the resolution of the 3D view is that bad?

Thanks for your help!

daniel

I created an elevation grid from a .csv files that contain thicknesses of clay for X,Y points. I want to represent thicknesses of clay underneath a dam. For some areas I dont have many datapoints so I'm not sure I want to present the information.

How do I remove selected areas of my Elevation grid? I created a polygone over it but can't extrude the grid....

I use version 25.1

Best,

Jerome

thanks,