Part of what makes Global Mapper such a user-friendly tool for data editing, analysis, and more is how it handles deleted features. From undo manager to standalone workspace, removed features don't always disappear. In a simple way that almost feels like magic when you come across it when you need it, vector features are stored in the workspace and can be resurrected under the right circumstances. Once you load a file into your workspace as a layer, the original file saved on your computer is not touched again. Any and all edits made to the layer are saved to the workspace, making the original file available as a backup or reference. Let's look at a few different ways to restore or "undelete" deleted features in the global mapper.
Note that these methods only work if you are in the original workspace from which the data was deleted, as the deleted features will be saved to the workspace. This applies especially to exports, as the exported files do not contain any deleted, filtered or cropped data.
Restore deleted features from workspace
There are many ways to delete features in the global mapper: cropping, spatial manipulation tools, the delete key on the keyboard, etc., but regardless, they are saved in the workspace. Deleted features can be visualized for reference, viewed but still excluded from analysis, or restored to full functionality.
To visualize deleted features in the global mapper, right-click in the workspace and select Render Deleted Features (Ctrl + Shift + D) from the options menu. This process won't bring features back to life, but it will display them for quick comparison. They will appear as pale ghosts or crossed-out dots in the background of their original layer.
When visualizing, deleted features appear as gray polygons, dashed points, or dashed gray lines.
Deleting in the global mapper does not completely erase features; it just marks them as deleted and removes them from view unless enabled. The number of deleted features in the layer can be seen in the Control Center. Unremoving these features will reset this count.
To "undelete" a function , first visualize it so that it appears in the workspace. Next, select the ghost/deleted features using the Digitizer tool, right-click anywhere in the workspace, and select Undelete (Shift + Delete).
Select the deleted features to enable the Undelete option in the right-click menu.
Tip: Do you want to temporarily delete features? Lidar has a display filter tool specifically designed to disable attribute-based feature rendering, but vector features are too broad to accommodate such functionality. Instead, you can copy and paste selected features into a new layer just as easily as copying and pasting a file on your computer. Select the features , press Ctrl + C, Ctrl + V, and you will be prompted to select a target layer for your data. Delete the original data and know that the moved features are safe and sound in their own layers.
Other potential methods of data necromancy
Reload original file
As mentioned before, after loading data into the workspace, the global mapper never changes the original data file unless it is overwritten. Therefore, re-importing the original data is also an option. The data will be loaded as separate layers. Features can be copied and pasted between layers to repopulate any missing features. For a more automated way to find features that are present in one layer but not contained in another layer, check out Predicate Queries in the Spatial Operations tool .
Undo function
Have these features been removed recently? This and most other operations in the global mapper can be undone using the undo function Ctrl + Z. The Undo Manager can be opened from the Edit menu. This dialog box contains a list of recent undoable actions you have performed and allows you to select actions that can be mapped. Please note that when the workspace is closed, the undo manager will be reset and all functionality will be lost. For more information on undo, see the blog Just Pretend It Didn't Happen - Undoing Your Work in the Global Mapper . Also, try the redo feature Ctrl + Y, which allows you to undo undo.
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