Q: What are the hardware and
software requirements to run GISHydro? |
GISHydro2000 requires a Windows 95/98/2000/NT/XP PC with at least a 200
MHz
processor, 600 MB hard disk space, and 32 MB RAM. Operation with
less hardware is possible, but is not recommended. |
Q: What types of
hydrologic analysis (models) can be run with the program? |
GISHydro2000 is capable of estimating peak discharges using the USGS
regional regression equations for Maryland (Dillow, 1996) and the NRCS
TR-20 rainfall/runoff model. |
Q: What is the resolution
of the database? |
The resolution of the database is fixed at 30m cells for all data
layers. Data whose source resolution was different than this value
was resampled. The database is stored in the following geographic
projection:
- Maryland State Plane Coordinates
- Horizontal Datum: NAD83
- Horizontal Units: Meters
- Vertical Datum: NGVD29 (DEMs)
- Vertical Units: Feet (DEMs)
|
Q: What is the geographic
coverage of the database? |
The geographic coverage of the GISHydro database corresponds to the
array of USGS 7.5 quadrangle sheets that cover land within and draining into the
State of Maryland, with the exception of analysis points along the Susquehanna
and Potomac Rivers.
The figure below shows the "Quads83" extent relative to local
state boundaries:
|
Q: What are the usage
restrictions of the software? |
GISHydro2000 was developed in cooperation with the Maryland State
Highway Administration. For this reason, the program is free to
download and use. The University of Maryland makes no profit from
the distribution of the program. Use of the software is permitted
provided that it not be re-sold, redistributed, duplicated, decompiled, or
reverse engineered in anyway. Acceptance of a software license
agreement is necessary when installing the program. |
