IDL, the language in which ENVI was written, is distributed with the CIA’s database of world coastlines and political boundaries. Beginning with the 3.0 release of ENVI, users can directly access the high or low resolution map databases to create vector layers and maps. IDL, the language in which ENVI was written, is distributed with the CIA’s database of world coastlines and political boundaries. Beginning with the 3.0 release of ENVI, users can directly access the high or low resolution map databases to create vector layers and maps. . The resulting dialog window will list the available databases from which you can create vector layers. You will be able to choose from Political Boundaries, Coastlines, Rivers, and USA States or any combination. Note that some of the selections may be grayed out depending on which coastline database you selected when you installed ENVI. The default ENVI installation installs only the low resolution database. If you choose a custom configuration when you install ENVI, you have the option to also install the high resolution database. You can save the new evf vector layers of this data to memory if you wish. However, if you intend to use them frequently you will find it more convenient to save them to disk. The EVF files generated from the low resolution database are quite small (less than 400 KB in total), the EVF files generated from the high resolution database are significantly larger (45 MB). If you want to create vector layers from the version of the database that you did not install (for example you chose the default installation but want the high resolution vector layers), all you need to do is temporarily copy the database files from your installation CD-ROM to the ENVI you installed on your system. You’ll find the coastline database files on the CD in: ‘ which contain the files for the two coastline databases. Simply copy the entire directory and all of its files into the corresponding directory under the ENVI/IDL installation on your system. For example, on a Windows machine, the appropriate destination directory under a typical installation of ENVI would be: Then, follow the steps outlined above for building the vector layers in ENVI and you should have access to the additional database. After you create the vector layers (i.e., the .evf files), you can delete the extra database files to save disk space. A simple way to make maps with these layers is to create a new, empty, georeferenced image file, then overlay the vector layers and grid lines. Using this method you will need to know some basic information about the map coverage you wish to make so that you can define the georeferencing information correctly (because the extent of the map coverage will be defined by a combination of the image size and the pixel size). For example, to make a map of Australia in a Lambert Conformal Conic projection: Source.