Blue Got Mail – Removing the Collar from Raster Topographic Maps in Global Mapper

This month, we reach deep into the technical support mailbag and pull out a letter from a customer who asks how to remove the collar from their raster topographic map in Global Mapper. Once again, Billy Noble is on hand to show us how this is done.

Blue Got Mail – Finding the coordinates of a point from a loaded point cloud in Global Mapper

Billy Noble, Applications Specialist at Blue Marble Geographics, answers questions that come into the technical support inbox. In this video, Billy demonstrates how to find the coordinates of a point in a loaded point cloud in LAS format using Global Mapper.

Blue Got Mail: Changing the Color of Map Labels in Global Mapper

Billy Noble, Applications Specialist at Blue Marble Geographics, answers questions that come into the technical support inbox. In this video, Billy demonstrates how to customize the color and fonts of labels in a layer of a map in Global Mapper.

Create a 3D Model from a Point Cloud in Global Mapper

One of the highlights of the version 20 release of Global Mapper is a new tool for generating a 3D mesh or model from a selected LiDAR or other point cloud points. The resulting layer contains a complex vector feature comprised of an array of abutting triangles that, when displayed in Global Mapper’s 3D Viewer, take the form of a realistic three-dimensional representation of the object. As is typical with Global Mapper, the process of creating a 3D mesh is remarkably straightforward.

Vector Extraction from a Raster Image in Global Mapper

 

In this example of extracting vectors from a raster layer in Global Mapper, we will automatically create polygons outlining lakes from an aerial image.

Here are the steps to follow to extract a vector from a raster layer:

  1. From the Layer menu, click Create Area Features from Equal Values…
  2. Name the target layer and choose the option to extract Only Selected Color(s)
  3. Choose Select Color from Map and click on a location representing the required color
  4. Apply a Color Fuzziness value and define the extent of the extraction process
  5. Use the Digitizer to remove unwanted polygons

The extracted polygons can be exported in any supported vector file format

Using the View Shed Tool in Global Mapper

In this 3-minute video, we follow the steps for conducting a view shed analysis in Global Mapper that allows us to see the visual impact of a project like a wind or solar farm. The tool highlights the clear line of sight of a project by using elevation data, the project’s location, height, and radius.