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Data Standards
The Nevada Invasive Plant GIS utilizes part of a
system developed in the state of Montana which is fully documented in Mapping
Noxious Weeds in Montana (pdf) by Diana Cooksey and Roger Sheley. NWAC has adopted
the attributes collected for point, line and area types of weed infestations
from the system. These attributes and the acceptable entries for each kind of
record are explained below.
Point Records
- Coordinates of the infestation
Latitude/Longitude – Decimal Degree*
(DD.DDDDD, -DDD.DDDDD)
-or-
UTM Northing and Eastings – Zone 11
-or-
Compile on 7.5’, 1:24000 scale quadrangles.
Weed Symbol
| Entry Code |
Size (Acres) |
| T |
less
than .1 |
| S |
.1 to 1 |
| M |
1
to 5 |
| L |
more than 5 |
| Entry Code |
Cover Class |
| T |
less
than 1% cover |
| L |
1 to 5% cover |
| M |
5
to 25% |
| H |
more than 25%
cover |
Line Records
- Coordinates of the linear infestation
Compile on 7.5’, 1:24000 scale quadrangles.
Weed Symbol
- Width of linear infestation (feet)
- Cover Class
| Entry Code |
Cover Class |
| T |
less
than 1% cover |
| L |
1 to 5% cover |
| M |
5
to 25% |
| H |
more than 25%
cover |
Area (polygon) Records
- Coordinates of the area infestation.
Compile on 7.5’, 1:24000 scale quadrangles.
Weed Symbol
| Entry Code |
Cover Class |
| T |
less
than 1% cover |
| L |
1 to 5% cover |
| M |
5
to 25% |
| H |
more than 25%
cover |
GPS Settings
NAD27/CONUS
Latitude / Longitude
Decimal Degrees (DD.DDDDD, -DDD.DDDDD)*
UTM
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