Yes, with Global Mapper v5.0 and above, you can use the Digitizer tool to draw new features on top of loaded data. You can also edit existing features with this tool. New and edited features can be exported to new vector files in any of the supported formats, such as ESRI Shapefiles and DXF.

To remove the collar from USGS DRGs, open the Control Center (found on the toolbar and under the Tools menu), highlight the DRG(s) that you want to remove the collar from, and select the Options button. Go to the Cropping tab of the dialog that appears and select the Automatically Crop DRG-style Collar option and press OK. The collar should now be removed from the selected DRG(s).

If for some reason the collar was not correctly removed, you may need to specify the collar bounds manually. To do this, press the Options button again and go to the Cropping tab and manually specify a boundary to crop the collar to.

If the collar surrounding your imagery files is either black or white (or very close to one of those colors), you can use either the Darken or Lighten blend mode functionality in Global Mapper to remove the collars. To setup the blend modes, open the Control Center (found on the toolbar and under the Tools menu), highlight the imagery layers that you want to remove the collar from, and select the Options button. If the color is black, select the Lighten blend mode from the Blend Mode drop-down list. If the collar color is white, select the Darken blend mode. Then press OK. Finally, you'll also need to set the background color of the Global Mapper view to be either black or white to match the collar color so that the non-overlapping regions aren't affected. You can change the background color under the View menu.

The problem of an extra border around exported DRGs that have had the collar removed is caused by the fact that DRG Quads are NOT rectangular in the UTM projection after their collar has been removed. Rather, they are aligned on lat/lon grid boundaries, which makes them a little bit skewed when viewed in a UTM projection. Because the base TIFF and JPG formats only support rectangular images, something must be used to fill in the areas around the quad such that the data fills a rectangle. This extra fill causes the border to appear.

The best workaround for this problem is to reproject the images to Geographic before exporting them to a new file. This way the quads will be rectangular and you won't have the extra border around the data. You can change the projection for viewing and exporting the data by using the Projection tab on the Tools->Configuration dialog. See the earlier FAQ question for more details.

Using Global Mapper v6.06 and later, all that you need to do to crop to an area on export is first either load the file containing the area feature or draw it using the Digitizer or Measure Tool. Then, select the area feature with either the Pick Tool or the Digitizer Tool, then select the appropriate File->Export Raster and Elevation Data menu command. The Export Bounds tab of the export options dialog that appears will have an option at the bottom to "Crop to Selected Area". Select this option and the export will be cropped to the selected area.

It is important to note that if you are exporting to an image format like JPG, GeoTIFF, or ECW, the resultant image will still be rectangular. The areas outside the selected crop area will be filled in with the currently selected background color. You can change the background color under the View menu.

Using Global Mapper v6.08 and later, you can treat any attribute/value pair associated with any vector feature (like point features) as either a link to a file on your local computer or a link to a web site. So to add a link, just create an attribute/value pair for the feature by first selecting the Feature Info tool, then clicking on the point feature, then pressing the Edit Feature button to bring up the edit dialog. On the edit dialog, add an attribute with a value that is either the filename or full URL to the web site, then press OK to return to the Feature Info dialog. Then, simply right click on the attribute/value pair in the Feature Info dialog and select the appropriate option from the popup menu to either open the value as a file or as a web link. If you already have the attributes assigned, there is of course no need to add them.

You will need to use the keyboard to zoom and pan around while using the Distance Tool. Switching tools will cause the measurement to be canceled. The arrow keys allow you to pan around and the Page Up/Page Down keys allow you to zoom in and out.

With Global Mapper v5.0 and above, you can rectify (georeference) any imagery, regardless of whether it has a world file. If you try to load imagery files with no positioning information, you will be prompted to rectify the image. You can also use the File->Rectify (Georeference) Imagery menu command to force the image to be rectified.

 

 

First load the elevation data that you wish to get the elevations from. Then use the File->Import Generic ASCII Text File(s) menu command to load a text file with a list of coordinates. Finally, use the File->Export Vector Data->Export Simple ASCII Text File menu command and make sure that the "Export Elevations for Each Vertex" option is checked. This should generate a new file with the coordinates and the elevation for each point in your original coordinate list. You can also do this using the scripting language documented at http://www.globalmapper.com.

Using Global Mapper v5.08 and above, there is an easy way to do this. First, load the file(s) containing the contours and/or 3D points of interest into Global Mapper using either the File->Open Data File or File->Open Generic ASCII Text File menu command, depending on which is appropriate for the type of data that you are loading. Then, open the Overlay Control Center (under the Tools menu or press Alt+C) and select the layer(s) from which you want to generate the elevation grid. Finally, right click and select the Create Elevation Grid from 3D Vector Data option on the menu that pops up and away you go!

Using Global Mapper v5.08 and above, you can do this using the blend mode functionality accessible from the Overlay Control Center. First, load the three TIFF files containing the separate color channels. Then, open the Overlay Control Center (under the Tools menu or press Alt+C) and select the layer containing the red colors. Press the Options button and change the Blend Mode selection to Keep Red, then press OK. Repeat this for the blue and green layers (selecting the Keep Blue and Keep Green blend modes respectively). After doing that you should have a color image in the main view area, but it may still be hard to see. To improve that, select all three of the layers and press Options, then enable the Auto-Adjust Contrast setting and press OK. In many cases this will generate a very visually appearing image, that can then be saved to a single full-color image using the GeoTIFF, BIL/BIP/BSQ or JPG export options.

At this time a version of Global Mapper that can natively run on a Unix or Macintosh system is not available. However, it is likely that Global Mapper can run on VirtualPC on Macintosh systems.

There are no limitations or copyright restrictions on new data files created by Global Mapper other than those imposed by the original provider of the data used to create the new files. You are free to use any derivative data products created with Global Mapper for any purpose, both commercial and non-commercial, without the need to reference Global Mapper or obtain permission from Global Mapper Software LLC. We would of course appreciate a citation, but it is not required.

We do offer a discount to academic instutions and those that are verifiably students who will not be using Global Mapper for commercial purposes. Contact us at This e-mail address is being protected from spam bots, you need JavaScript enabled to view it for information on how to obtain this discount.

dlgv32 Pro is a version of Global Mapper distributed by the USGS. For all intents and purposes the software packages are identical. If you wish to replace dlgv32 Pro with Global Mapper but maintain your settings, you need to follow the following steps. First download and install the latest version of Global Mapper. Then run Global Mapper and exit it. This will insure that your dlgv32 Pro settings are copied to Global Mapper. Finally, uninstall dlgv32 Pro from the Add/Remove Programs option on the Control Panel.

Yes, use the Ctrl+L shortcut key to copy the current cursor coordinate string to the clipboard. Once in the clipboard, it can be pasted into any location that accepts text using the Paste command, usually associated with the Ctrl+V shortcut.

To drape raster imagery over gridded elevation data, first load the elevation data, then the raster data. Open the Control Center (found on the toolbar and under the Tools menu), highlight the raster image(s) you want to drape, and select the Options button. Select the Texture Map option and press OK. The raster image(s) should now be draped over the elevation data and shaded. Note that you will have to have hill shading enabled in order to see any difference (this is the rightmost button on the toolbar).

The current view projection can be modified on the Projection tab of the Configuration dialog. You can access the Configuration dialog either from the toolbar or under the Tools menu.

 

 

 

Global Mapper requires a registration number to perform some functions, such as exporting data. You can purchase a registration number from the Download/Purchase page at http://www.globalmapper.com. You do not need a registration number for just viewing data, although you are limited to viewing 4 data files simultaneously without a registration key.

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