Spatial Information
The "raw" locational data for all the individual survey lots collected during survey at San Ramón de Alajuela is provided as an AutoCAD (Release 12) .DXF file named MAP.DXF. The maps are georeferenced to topographic maps in coordinate systems projected from latitude and longitude (Lambert North Projection) using Clarke 1866 ellipsoid and Ocotepeque Datum (Fundamental de Ocotepeque) of 1935. Units are expressed in meters. The layers in this drawing, their colors, and the information contained on each are as follows:
- LOTS (red): AutoCAD closed polylines enclosing the areas that represent the extents of each individual collection lot.
- RIVERS (Blue): AutoCAD polylines tracing the course of the channels and rivers inside the survey zone.
- SITE_NUMBER (Magenta): AutoCAD text strings giving the lot number designation for each lot. These text strings correspond to the lot numbers in the Lot Information section, as well as in the Ceramic Inventory, Foreign Ceramics, and Ceramic Densities datasets.
Their insertion points are inside the polylines they correspond to, for AutoCAD or other programs capable of matching text strings to polylines in this way.
- STUDY_AREA (White/black): AutoCAD closed polyline representing the limits of the survey zone.
- TOPO100 (Brown): AutoCAD polylines depicting topographic contour lines at 100 meter intervals. The elevations (z-values) of the polylines are their elevations in meters above sea level.
Download the file MAP.DXF (3 MB).
The same information is also provided in ArcGIS .SHP format in the file MAP.ZIP (352 KB), which uses the UTM Zone 16N (units are meters) coordinate system based on the WGS84 datum.
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