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Low Elevation Valley Floors Special Element

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This metadata information is subject to our disclaimer. Metadata information presented here is maintained manually. Therefore, date-sensitive fields such as feature count and date of last update may not be up-to-date. All metadata is subject to errors inherent in a manual process.


Descriptive nameLow Elevation Valley Floors Special Element
File namevfloor
Spatial domainPima County
AbstractVfloor displays "low elevation" valley floors as those areas that are less than 2500 feet above mean sea level and on 1% slope or less.
Known errors/qualificationsCreated from 30-meter DEM. Slope grid also created from 30-meter DEM. Grid-code of 1 indicates area is inside the low elevation valley floors while -9999 indicates area is not inside low elevation valley floors.
Feature typepolygon
Feature count 202,393
Thumbnail Map vfloor.pdf PDF file format   (13,588,094 bytes, PDF created 07/21/2022 )
ProjectionNAD83 HPGN (Parameters)
Rectificationn/a
Field/value metadata Field metadata
Source organizationUSGS - NED
Source contact
Source document or file namedem30_hpgn
Source date20000801
Source scale
Source formatUnknown
Second source namePC DOT GIS Division
Second source contactWilliam Tanksley
Second source document or file namelevf_pc (Arc/Info GRID)
Second source date20020227
Second source scale
Second source formatGrid
Date of last data update
(This date may not be current.)
20020227
Last data update byunknown
Date/time last touched - Meaning? 2021-04-05  11:50 PM - Enterprise GDB
  2021-04-05  11:51 PM - Shapefile - Library input format
  See coverage files, if any, for date.
LineageReselected dem30_hpgn for elevation <= 2500 ft. Created slope grid from dem30_hpgn. Added two grids together and made resulting grid into an integer grid. Converted grid to polygon.
On maintenance?No
Maintenance organization
Maintenance description
Original conversion byUSGS
Pima County ITD GIS contactJohn Regan
Alternate Pima County ITD GIS contacte-mail address
On  Pima County Geospatial Data Portal? No

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