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| GEOGRAPHIC INFORMATION SYSTEMS DATA |
| The GIS data on this CD-ROM may be accessed through the gisdata directory. |
| ARCVIEW SHAPEFILES ArcView shapefiles are a simple, non-topological format for storing the geometric location and attribute information of geographic features. The shapefile format defines the geometry and attributes of geographically-referenced features in as many as five files with specific file extensions that should be stored in the same project workspace. shapefile content (metadata) |
| OR |
| go directly to the files./gisdata/coverage/ (referenced in Geographic Coordinates) |
| ARC/INFO COVERAGES ARC/INFO coverages are a topological data structure for geographic features. The coverage format is suitable for spatial analysis and large geographic data management applications. Defining spatial features topologically in a coverage can optimize data storage by reducing coordinate redundancy. (read more about ARC/INFO coverages...) |
| OR |
| go directly to the files below |
| Coverages projected into UTM Zone 19; WGS84 reference ellipsoid |
| Coverages projected into UTM Zone 20; WGS84 reference ellipsoid |
| Mayaguez data (UTM Zone 19; WGS84 reference ellipsoid) |
| Luquillo data (UTM Zone 20; WGS84 reference ellipsoid) |
| ARC/INFO INTERCHANGE FILES (*.e00) |
| An interchange file contains all coverage information and appropriate INFO file information in a fixed-length, ASCII format. It can be fully or partially compressed and uncompressed ASCII depending upon the EXPORT option used.(read more about these e00s...) |
| OR |
| go to the files |
| Lineament and Lithologic Data (in Geographic Coordinates) |
| Luquillo data; (UTM Zone 20; WGS84 reference ellipsoid) |
| Mayaguez data (UTM Zone 19; WGS84 reference ellipsoid) |
| PROJECT FILES |
| ArcExplorer saves projects in files with an *.aep extension. The map display properties, map extent, view properties, any classification or labels, and any scale factors you may have set are saved. An ArcView project file (*.apr) doesn't contain the actual data that you use in ArcView, such as spatial data like shapefiles and ARC/INFO coverages, and tabular data like dBASE files. Instead, a project stores references to the location of these data sources on disk. In this way, the same data can be used in any number of projects without duplication. |
| ArcExplorer Project Files |
| ArcExplorer Installation |
| ArcView 3.0a Project File |
| DIGITAL ELEVATION MODELS |
| A digital elevation model (DEM) consists of a group of elevations for ground positions; usually at regularly spaced intervals. Elevations are in meters relative to mean sea level. (read more about these DEMs...) |
| OR |
| go to the files |
| DEMs projected into UTM Zone 19; WGS84 reference ellipsoid.(for use with Mayaguez data) |
| DEMs projected into UTM Zone 20; WGS84 reference ellipsoid. (for use with Luquillo data) |
| DEMs in Geographic Coordinates |
| TIFFS AND WORLD FILES |
| The world files (*.tfw) contain real-world transformation information used by images in separate ASCII files. (read more about world files) |
| OR |
| go directly to the files Mayaguez (UTM Zone 19; WGS84 reference ellipsoid) |
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