Coastal

This tool finds coastal cells (land cells with water in a given neighborhood) with a brute force search and marks corresponding cells in the m_adWater array of the Geography group in a QDF file.

Code: Coastal.cpp

Usage

${QHG4_DIR}/import/Coastal -i <input_qdf> -d <distance> -o <output_qdf>

where

input_qdf

a qdf file with a Geography (Altitude) group in which to search for coastal cells.

distance

maximum distance to sea (in cell hops).

output_qdf

output file (coastal written to DS ‘Coastal’ in the ‘Geography’ group.)

../images/water_coasts.png

Algorithm

  • loop through all cells C in the input file’s grid.

  • if C has positive altitude then

    • loop through all cells N in a d-distabce of C

    • if N has negative altitude then

      • set m_adCoastal[i] to 1 (where i is the index of C)

      • exit loop

    • endif

  • end loop

  • write QDF file