| 1 |
IDENTIFICATION INFORMATION |
| 1.1 |
Citation |
| Originator |
Metro Data Resource Center |
| Publication date |
2000 |
| Title |
Vegetation Coverage 2000 |
| 1.2 |
Description |
| Abstract |
This is a simple vegetation landcover
layer collected via interpretation of panchromatic digital
orthophotographs. Polygons were digitized around forest, woody
non-forest vegetation, open space, and developed gaps. Forest
landcover types were delineated for the entire area within the Metro
Service District and all sections within one mile beyond the
District boundary. Woody non-forest vegetation and open space was
delineated only within 300 feet of a mapped stream within the Metro
Service District and all sections within one mile beyond the
District boundary. |
| Purpose |
This data was developed to provide more
accurate information on the edges of potential resource features for
Metros Fish and Wildlife Protection program and to augment
satellite based landcover and canopy data for other metro
programs
|
| Supplemental information |
The landcover types digitized represent
features as seen from a birds eye view. Landcover polygons do not
incorporate information on the existing or planned use of the
location they occur on unless it is visible and relevant to the
delineation. Landcover patches were delineated by trained technical
staff to be used at a scale of one 1 inch to 800 feet. The actual
scale at witch data was collected was 1 inch to 400 feet, however,
errors in digitizing, interpretation, and the spatial accuracy of
the orthophotos used makes the usable scale higher. The minimum
mapping unit for a landcover polygon was one acre. Any landcover
polygon less than on acre in size should be considered no data.
Roads, where visible in the photos, were not digitized as breaks in
the landcover types unless they had four our more lanes or an
excessive un-vegetated right of way adjacent to them. For forest
landcover types, technical staff were trained to identify relatively
dense groupings of trees (>60% coverage) as patches. Cross
analysis with satellite canopy data shows that 76% of the patches
delineated are predominately closed forest canopy (76% to 100% total
coverage). The remaining 24% are predominately open forest (51% to
75% total coverage).
|
| 1.3 |
Time period of content |
20010606 |
| 1.4 |
Status |
| Progress |
Complete |
| Maintenance/update frequency |
As needed |
| 1.5 |
Spatial domain |
| Description |
Urban Clackamas County, Multnomah County, and
Washington County, Oregon |
| West bounding coordinate |
-123.15156069
|
| East bounding coordinate |
-122.31651100
|
| North bounding coordinate |
45.70263875
|
| South bounding coordinate |
45.23396470
|
| 1.6 |
Keywords |
| Theme keyword thesaurus |
None
|
| Theme keyword |
forest, vegetation, canopy
|
| Place keyword thesaurus |
None
|
| Place keyword |
Portland, Multnomah County, Washington
County, Clackamas County, Oregon
|
| 1.7 |
Access Constraints |
None |
| 1.8 |
Use Constraints |
These data are sold under the agreement
that the user may use the data in its business activity and for no
other purpose whatsoever. User shall not allow access to the data by
any other person or organization, unless authorized in writing by
the Metro DRC or, if the other party is a contractor providing
services to a government requiring usage of the data in order to
provide contractual services.
User shall not duplicate the data
except for the following:
(1) User may make one backup copy of
the data, and
(2) User may translate the data into other formats
and/or media.
For full product purchase agreement that
accompanies these data, please see
http://storefront.metro-region.org/drc/rlislite/subscribe/license.cfm
|
| 1.10 |
Browse graphic |
| Browse graphic file name |
|
| Browse graphic file description |
|
| Browse graphic file type |
|
| 1.13 |
Native data set environment |
Cover name: $TL/reg/vegcov00
Software/hardware: ArcInfo 8.1 on NT workstation.
ArcSDE 8.1
on Compaq Alpha 4100. Tru64 5.0 OS. |
| [Top
of Page] |
| 2 |
DATA QUALITY INFORMATION |
| 2.4 |
Horizontal positional accuracy |
Delineated on-screen to 2000 ortho
photography. |
| [Top
of Page] |
| 3 |
SPATIAL DATA ORGANIZATION INFORMATION
|
| 3.2 |
Direct spatial reference method |
Vector |
| 3.3 |
Point and vector object information |
| SDTS point and vector object type |
Polygon
|
| Point and vector object count |
|
| 3.4 |
Raster object information |
| Raster object type |
NA |
| Row count |
|
| Column count |
|
| 4 |
SPATIAL REFERENCE
INFORMATION |
| 4.1 |
Horizontal Coordinate System |
| Grid coordinate system name |
State plane coordinate system 1983.
|
| SPCS zone identifier |
5076 |
| Planar distance units |
International feet |
| Horizontal datum name |
North American Datum of 1983/1991 (HPGN)
|
| [Top
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| 5 |
ENTITY AND ATTRIBUTE INFORMATION |
| 5.2 |
Overview description |
Related data files and field descriptions follow:
|
| Table Name |
Column |
Sample Domain Value |
Definition |
| Vegcov00.pat |
-- |
-- |
Vegetation coverage attribute table
|
|
forest |
-- |
Vegetation coverage type. |
|
|
1 |
Forest |
|
|
2 |
Grass or open field |
|
|
3 |
Woody or shrub |
|
| [Top
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| 6 |
DISTRIBUTION INFORMATION
|
| 6.1 |
Distributor |
| Contact organization |
Metro Data Resource Center |
| Address |
600 NE Grand Ave. |
| City |
Portland |
| State or province |
OR |
| Postal code |
97232 |
| Contact voice telephone |
503 797-1742 |
| Contact facsimile telephone |
503 797-1909 |
| Contact electronic mail address |
drc@metro.dst.or.us |
| 6.3 |
Distribution liability |
The information in this file was derived from
digital databases on Metro's GIS. Care was taken in the creation of
this file. Metro cannot accept any responsibility for errors,
omissions, or positional accuracy. There are no warranties,
expressed or implied. |
| 6.4 |
Standard order process |
| Digital transfer information |
| Format name |
Shapefile, arc export, DXF or MapInfo.
Hourly fee will be charged for conversion |
| Transfer size |
|
| Digital transfer options: |
| Online option |
| Network resource name |
ftp.metro-region.org |
| Access instructions |
Metro can place data on its FTP site on
request. In most cases, a fee for the data will be charged. Call 503
797-1742 or email drc@metro.dst.or.us for instructions. |
| Offline option |
| Offline media |
CD-ROM |
| Recording format |
ISO9660 (DOS, Unix, or Macintosh) |
| Offline option |
| Offline media |
Zip cartridge |
| Recording format |
Iomega |
| Fees |
|
| [Top
of Page] |
| 7 |
METADATA REFERENCE
INFORMATION |
| 7.1 |
Metadata date |
20011009 |
| 7.4 |
Metadata contact |
| Contact person |
Justin Houk |
| Contact voice telephone |
503 797-1664 |
| Contact facsimile telephone |
503 797-1909 |
| Contact electronic mail address |
houkj@metro.dst.or.us |
| 7.5 |
Metadata standard name |
FGDC Content Standards for Digital
Geospatial Metadata |
| 7.6 |
Metadata standard version |
19940608 |