| Visual Resource Management Classes (VRM) - Lake Havasu Field Office Resource Management Plan (2007) | |
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Data format: Shapefile File or table name: VRM_LHFO Coordinate system: Universal Transverse Mercator Theme keywords: BLM, Bureau of Land Management, VRM, Visual Resource Management, VRM Classes, planningCadastre, 015, environment, 007, Land Use Planning, Visual Resource Management |
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Abstract:
GIS data representing Visual Resource Management Classes (VRM) designated in the 2007 BLM Lake Havasu Field Office RMP (in Arizona and California). Each of the four Visual Resource Management (VRM) Classes allows for a different degree of modification to the basic elements of the landscape. VRM classes are assigned to BLM-managed public lands in the Record of Decision for a Resource Management Plan. They are determined by applying management constraints to Visual Resource Inventory Classes. |
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Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.
GIS data representing Visual Resource Management Classes (VRM) designated in the 2007 BLM Lake Havasu Field Office RMP (in Arizona and California). Each of the four Visual Resource Management (VRM) Classes allows for a different degree of modification to the basic elements of the landscape. VRM classes are assigned to BLM-managed public lands in the Record of Decision for a Resource Management Plan. They are determined by applying management constraints to Visual Resource Inventory Classes.
For regional analysis and display at 1:100,000 This dataset was prepared in the Lake Havasu Field Office Resource Management Plan process. Visual resource considerations must be made in resource management plans (RMP’s), in the implementation of projects, and in management actions.
Dataset locally known as VRM_LHFO.shp This dataset and other datasets in the Lake Havasu Field Office Geographic Information Database represent data for the BLM Lake Havasu Field Office.
publication date
This data should be used in conjunction with the Lake Havasu Field Office RMP of 2007. This data should not be used at a scale larger than 1:100,000. The data and corresponding attributes are only as accurate as the source maps from which they were obtained, and may vary depending on the data and method of acquisition. This data is suitable for regional planning, management decision support at intermediate scales (i.e. 1:100,000 or smaller), and cartographic purposes. The data is not suitable for analysis at scales larger than 1:100,000. If the Receiving Agency (RA) has modified the data in any way, they are obligated to describe the types of modifications they have performed on hardcopy maps utilizing the data. RA specifically agrees not to misrepresent LHFO datasets or to imply that any changes made were approved by BLM LHFO. No warranty is made by the BLM for use of the data for purposes not intended by BLM. This information may be updated without notification.
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Feature attributes were taken from source material. Code assignments are believed to be representative of the source document.
Data was reviewed for correct topological structure. Duplicate lines have been removed.
Data is considered complete for the Visual Resource Management Classes (VRM) approved in the LHFO RMP 2007.
Overall horizontal accuracy for this data is not greater than national mapping accuracy standards (NMAS) for USGS source maps. Snapping and coordinate shift tolerances were maintained at 0.01 meters or less through editing. Horizontal positional accuracy for the digital data set was tested by visual comparison of the source data with hard copy verification plots.
The method identifed in VRM Technical Note 407 (Integrating GIS Technologies with the Visual Resource Management Inventory Process) was used to create the following themes: Scenic Quality Class (vr.sqc.shp), Visual Sensitivity (vr.vs.shp), and Visual Distance Zones (vr.vdz.shp). These themes were combined in different ways to produce four different alternatives for the LHFO RMP process.
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retiring end of August 2007
Some corrections were made and the Alternative 5 version was modified for the Proposed RMP based on comments received through the comment period.
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The dataset was renamed and the attribute table was brought up to standards which required additional fields and formatting. Metadata was updated.
Dataset reprojected from NAD 1927 UTM Zone 12 to NAD 1983 UTM Zone 12 using NADCON. Metadata updated.
calculated acres for each segment
ESRI
Feature geometry.
ESRI
Identify by State/Field Office/polygon number.
VRM-Technical_Note_407.pdf
Lake Havasu Field Office in Arizona with sequential numbering
VRM-Technical_Note_407.pdf
Internal feature number.
ESRI
identifies the assigned VRM Class
VRM-Technical_Note_407.pdf
VRM Class I areas are where only natural ecological changes and very limited management activities are allowed. Any contrast created within the characteristic landscape must not attract attention. This classification is applied to wilderness areas, visual ACEC’s, and other similar situations.
VRM-Technical_Note_407.pdf
VRM Class II areas are where changes in any of the basic elements (form, line, color, texture) caused by a surface-disturbing activity should not be evident in the characteristic landscape. Contrasts must not attract attention.
VRM-Technical_Note_407.pdf
VRM Class III areas are where contrasts to the basic elements caused by a management activity may be evident, but should remain subordinate to the existing landscape.
VRM-Technical_Note_407.pdf
VRM Class IV areas are where contrasts may attract attention and be a dominant feature of the landscape in terms of scale, but should repeat the form, line, color, and texture of the characteristic landscape.
VRM-Technical_Note_407.pdf
Short version of the VRM Class
VRM-Technical_Note_407.pdf
VRM Class I
VRM-Technical_Note_407.pdf
VRM Class II
VRM-Technical_Note_407.pdf
VRM Class III
VRM-Technical_Note_407.pdf
VRM Class IV
VRM-Technical_Note_407.pdf
Attribute items are in typical ArcInfo point, line and polygon format.
The various classes are determined for each area of public land according to alternatives and decisions considered in the land use planning process. The Record of Decision documents the applicable locations and classes for management.
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BLM-LHFO provides this data "as is" without liability. No warranty is made by the Bureau of Land Management as to the accuracy, reliability, or completeness of these data for individual use or aggregate use with other data.
Shapefile or ESRI ArcInfo Coverage
Contact Distributor
Contact Distributor
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