RAMAS GIS 3.0 Technical Requirements

System: Windows 95, Windows NT 4.0, or later.

Note: if you do not use Windows 95 or NT, see RAMAS GIS version 2.0 (DOS) Technical Requirements

Hardware: IBM-compatible personal computer with at least 16 megabytes of memory and 4 megabytes of free hard disk space.

GIS data requirements: Your GIS data layers must have the following: (i) the maps must be in raster format; (ii) all layers must be numerical; (iii) all must describe the landscape with the same precision (i.e., number of cells in both north-south and east-west directions should be the same); (iv) coverage of all maps must be identical (the corners of the rectangular area described by all maps should be the same); (v) the number of columns must be the same for each row; (vi) the "cells" (i.e., locations given a value by the map) must be arranged in a square (not hexagonal) format; (vii) the maximum number of rows and columns depend on the available memory, but each cannot exceed 5000. The formats supported are:

• GRASS: Exported as an ASCII file from GRASS (with header). See description of r.out.ascii in the GRASS Reference Manual. Do not use the option -h.

  IDRISI: Raster (image) file of IDRISI in binary or ASCII format. The document or description file (.DOC) must also be in the same directory as the image file (.IMG). The image can be ASCII (integer or real) or binary (byte, integer, real), but not packed binary.

  ARC/INFO: Exported as an ASCII file from ARC/Info (with header). See description of the command GRIDASCII in ARC Command References in the ARC/Info manual.

  PC ARC/INFO: Exported as a Non-compressed ASCII file from PC ARC/Info, with the command POLYGRID.

  ArcView: See Using maps from ArcView in RAMAS GIS.

  Shape files: See Using shape files in RAMAS GIS.

  blanks: ASCII format (no header); each row of map must be in a single line (terminated by line-feed/carriage-return characters), and values must be separated by blanks. If each row takes more than one line in the file, the "fixed grid" format must be used.

  fixed grid: ASCII format (no header); each row of map may be in one or more lines. Cell values must be separated by blanks. Number of columns (i.e., the number of cells in each row) must be specified. 

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