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It is a vector digital data structure, digitized from a 1:5,000,000 scale
mylar map. The source software was ARC/INFO 6.1.2 and the conversion software
was ARC/INFO 7.1.1. The size of the export file is about 1.5 MB.
of the Continental United States. These data are typically used as
background data and should be used at scales of 1:500,000 and smaller.
The exact projection of the original map is somewhat uncertain. The
map was digitized in inches from a mylar original and then transformed
iteratively into Albers coordinates until a fit was achieved.
A state boundary line runs down the digital map as it does on the
mylar original. Each half was a separate data set. The two were joined
using MAPJOIN. This resulted in two sliver polygons which were deleted.
Revisions:
None
Reviews_Applied_to_Data:
None
Related_Spatial_and_Tabular_Data_Sets:
None
Other_References_Cited:
NOAA Technical Report NWS33
Notes:
Contact the RGIS Clearinghouse for price information.
liability for misuse of the data. Data should be used at the scale
for which they were intended. No warranty, expressed, or implied, is
made by Earth Data Analysis Center (EDAC) regarding the utility of
the data on any other system, nor shall the act of distribution
constitute such warranty.
ARC/INFO version 7.2.1
Tolerances were chosen to prevent errors in labels,
intersections, tics, overshoots, and undershoots. Tests
were performed to detect these types of errors and necessary
corrections were made.
or less.
rate in inches. This is free water surface evaporation, the rate of
evaporation from a shallow lake for a year.
no guarantee or warranty concerning the accuracy of information
contained in the geographic data.
RGIS further makes no warranties, either expressed or implied
as to any other matter whatsoever, including, without limitation,
the condition of the product, or its fitness for any particular
purpose. The burden for determining fitness for use lies entirely
with the user. Although these data have been processed successfully
on computers of RGIS, no warranty, expressed or implied, is made by
RGIS regarding the use of these data on any other system, nor does the
fact of distribution constitute or imply any such warranty.
In no event shall RGIS have any liability whatsoever for payment
of any consequential, incidental, indirect, special, or tort damages
of any kind, including, but not limited to, any loss of profits
arising out of use of or reliance on the geographic data or arising
out of the delivery, installation, operation, or support by RGIS.