5 Minute Global Land and Seafloor Elevations: Hamilton Exploration
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https://cmr.earthdata.nasa.gov/search/concepts/C1214584956-SCIOPS.html
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资源简介：
The following text was abstracted from Bruce Gittings' Digital Elevation
Data Catalogue: 'http://www.geo.ed.ac.uk/home/ded.html'. The catalogue is a
comprehensive source of information on digital elevation data and should be
retrieved in its entirity for additional information.
Global land and seafloor elevations exist... in ASCII on IBM-formatted
floppy disk as a 5 degree quad at 5 arc second resolution for $75 or a one
degree quad at 12 arc second resolution for $195 (designate the SW corner of
the required quad in each case). Data may be redistributed for non commercial
purposes only. The following data are available for each USGS 7.5' quadrangle.
Data is arranged and sold by layers. Files are in AutoCAD format. Data is
under copyright.
Basic roads.............. $80 Enhanced roads.......... $100
Double line roads....... $150 Geographic names......... $40
County Lines............. $80 Township Range and Section
Lines... $80
Contours................ $160 Terrain Relief Grid..... $160
Quicksurf Compatible x,y,z ascii... $160
提供机构：
SCIOPS
