The topographic map information was digitized from stable
originals (cronaflex mylar blackline positives) of the map
separates at 1:125,000 scale. The following separates were
scanned:
1. Composite of the culture, culture-names, land net and primary roads
2. Composite of the drainage and drainage names
3. Composite of intermediate and index contours
4. Secondary roads
Scanning was done on a Scitex R280 at a resolution of 20
points/millimeter (508 dpi). The Scitex R280 was used to edit
the raster scans and to separate the index and intermediate
contours into separate coverages. The raster scans were then
vectorized on the Scitex R280 with a curvetype of 1 and a
tolerance of 1. The vectorization process distorts characters
representing letters and numbers, as well as some other symbols,
rendering them unreadable in some instances. The vectorized
scans were imported into ARC/INFO using the SCITEXLINE command.
ARC/INFO was used to modify edge joins, and to remove duplicate
names (in adjacent sheets) and marginal information (to allow for
mosaicing of adjacent sheets). Each file was converted from
digitizer inches to UTM meters using latitude/longitude
intersections on the scanned separates as reference points.
