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:
From the Layer menu, click Create Area Features from Equal Values…
Name the target layer and choose the option to extract Only Selected Color(s)
Choose Select Color from Map and click on a location representing the required color
Apply a Color Fuzziness value and define the extent of the extraction process
Use the Digitizer to remove unwanted polygons
The extracted polygons can be exported in any supported vector file format
VIDEO Can your GIS software do all of this without extensions?
Process LiDAR data
Create elevation grids from filtered LiDAR
Apply custom shaders
Calculate cut and fill values
Generate contour lines
Global Mapper does it all.
Download Global Mapper today: http://bit.ly/b-no-extensions
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.
Export 3D Path Profile lines of a stream in Global Mapper by following this tutorial by Blue Marble Geographics.
Download or read more about Global Mapper here.
Finding obstructions using the Line of Sight and View Shed tools in Global Mapper.