The Alaska Geobotany Center uses the following extensions to indicate the format of a data file. The extension typically consists of the last three or four characters that follow the period in the filename.
File Extension |
File Format |
.avl |
ESRI ArcView 3.x legend file |
.bil |
Band Interleaved by Line raster image |
.bsq |
Band Sequential raster image |
.dbf |
dBase file, generally exported from an Excel or an ESRI application |
.doc |
Microsoft Word document |
.ppt |
Microsoft Powerpoint presentation |
.pdf |
Adobe Acrobat document |
.xls |
Microsoft Excel spreadsheet |
.e00 |
ESRI Arc/Info export file |
.lyr |
ESRI ArcGIS layer file |
.gz |
file compressed using the Gnu GZIP algorithm. Compressed files will typically have the .gz appended to the original file extension. |
.zip |
ZIP compressed file, generally produced using the 7-Zip freeware compression utility. |
.jpg (.jpeg) |
Joint Photographic Experts Group raster image |
.png |
Portable Network Graphic raster image |
.tif .(tiff) |
Tagged Image File Format raster image |
.txt |
Text file |
.rtf |
Rich Text Format |
.shd |
ESRI Arc/Info shadeset |
