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Land Cover Portland Metro, Oregon 1998

Identification Information

Citation
Title
Land Cover Portland Metro, Oregon 1998
Originator
Metro Data Resource Center
Publication Date
2001-02-01
Identifier
https://geodiscovery.uwm.edu/catalog/ark:-77981-gmgsn00zs94
Geospatial Data Presentation Form
mapDigital
Abstract
This TIF data layer represents land cover for Portland Metro, Oregon in 1998. The dataset was originally published by the Metro Data Resource Center in February 2001.[The Land Cover Layer was developed by updating and utilizing the 1992 land cover classification and updating areas of change or areas not previously classified. The two 1991 and 1998 Landsat TM scenes were first co-registered. Once co-registered, a multi-temporal image data set was produced by combining one band from each date of imagery into a single image data set. A simple classification of this merged data identified areas that had undergone land cover change between 1991 through 1998. Digital image processing techniques were used to digitally discriminate and map those areas of significant land cover change since 1991. Once the areas of change were identified, their current land cover and land use status was classified by manual photo-interpretation. The newly classified areas were manually edited or relabeled directly on the TM imagery. This task resulted in the digital capture of updated land cover and land use information in a GIS data layer that is co-registered to the original 1992 land cover classification. Once the updated areas of change were digitally captured and mapped, the GIS layer(s) containing the updates was integrated with the existing land cover map producing a new 1998-current land cover and land use classification for the previously mapped area. Classification of any new areas in the project study area that were not previously mapped in the 1992 classification was accomplished using a combination of the 1998 Landsat TM imagery, aerial photography, and digital orthophotos. A two-acre minimum mapping unit was utilized in the updating and development of the 1998 land cover classification. This phase of the project resulted in a digital raster GIS data layer in which the entire study area is classified according to a generalized classification scheme of the 1992 land cover map.]
Purpose
This layer is intended for reference and mapping purposes and may be used for basic applications such as viewing, querying, and map output production or to provide a basemap to support graphical overlays and analysis with other spatial data.
Supplemental Information
Augmented original metadata with AGSL specific elements. For official metadata contact the resource Point of Contact. Also see LANDCO98.HTM.
Temporal Extent
Bounding Box
West
-123.355103
East
-122.037184
North
45.760934
South
45.117518
ISO Topic Category
environment
Place Keyword
Portland Metro
Oregon
Place Keyword Thesaurus
GeoNames
Theme Keyword
Raster
Theme Keyword Thesaurus
FGDC
Theme Keyword
Land cover
Theme Keyword Thesaurus
LCSH
Resource Constraints
Use Limitation
Please see the UWM Libraries statement on Copyright and Digital Collections.
Legal Constraints
Use Limitation
Although this data is being distributed by the American Geographical Society Library at the University of Wisconsin-Milwaukee Libraries, no warranty expressed or implied is made by the University as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the University in the use of this data, or related materials.
Other Restrictions
None
Status
completed
Maintenance and Update Frequency
notPlanned
Language
eng
Credit
Metro Data Resource Center
Point of Contact
Contact
Metro Data Resource Center
Email
DRC@oregonmetro.gov
Phone
503-797-1742

Spatial Reference Information

Reference System Identifier
Code
2913
Code Space
EPSG
Version
6.13(9.0.0)

Data Quality Information

Quantitative Attribute Accuracy Report
Result
Lineage
Process Step
Description
Projected data and changed name of file from LANDCO98.TIFto PortlandMetro_LandCover_1998.TIF.

Distribution Information

Format Name
Raster Dataset
Format Version
Distributor
University of Wisconsin-Milwaukee
Distributor
Metro Data Resource Center

Content Information

Content Type
thematicClassification

Spatial Representation Information

Raster
Number of Dimensions
2
Column Count
4052
Row Count
2752
Cell Geometry Type
area
Corner Points

Metadata Reference Information

Hierarchy Level
dataset
Metadata File Identifier
ark:/77981/gmgsn00zs94
Dataset URI
https://geodata.uwm.edu/public/gmgsn00zs94/PortlandMetro_LandCover_1998.zip
Metadata Point of Contact
Name
American Geographical Society Library – UWM Libraries
Position Name
GIS Staff
Delivery Point
2311 E Hartord Ave
City
Milwaukee
Administrative Area
WI
Postal Code
53211
Country
US
Email
gisdata@uwm.edu
Phone
(414)-229-6282
Metadata Date Stamp
2023-10-23
Metadata Standard Name
ISO 19139 Geographic Information - Metadata - Implementation Specification
Metadata Standard Version
2007
Character Set
utf8
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