r ra rb rc rd re rf rg rh ri rj rk rl rm rn ro rp rr rs rt ru rv rw ry rz

Перевод: raster

клише

Тезаурус:

1. The selection of a raster size presents some other problems.
2. One answer is to use a finer grid to achieve finer detail (Walsh et al. 1987), but this causes a corresponding increase in the size of the raster database.
3. Errors associated with vector to raster conversion
4. It may be easier to implement it in a raster environment, but much would depend on the size of the rasters chosen to represent the areas.
5. Given that the fuzzy tolerance is 25 mapunits, then the raster size should be that or less, to remove the quantization noise.
6. A low-level approach based upon the pixel information used to display a digital image, sometimes referred to as bit mapped, raster based, or image file.
7. The methodology used here is a three-stage operation; first, the binary raster files or single variable files (SVFs) are expanded into character form, compressed (Held 1983), and a row number added; second, the files area is sorted by the row number so that all records with the same row number are contiguous in the file; third, a count is made of all the rasters in each row which are simulated to be inside the required areas.
8. There are generally recognized to be two major sources of error when converting vector maps (either paper or digital) into gridded or raster format.
9. However, reducing the raster size from 100 to 25 mapunits increases the disc space required to store the raster files by a factor of 16 as well as increasing processing times.
10. For the experiments here, a raster size of 1 km (100 mapunits) is used.
11. The object of the final analysis is to create a data set which contains, for each raster, the number of times it is simulated to be inside the areas resulting from the sequence of GIS operations.
12. Calculate frequencies for each raster; and