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Orthophotos Metadata 2005


Orthophotos 2005 - Color

Name(s) Orthophotos; Color; 3-band RGB
Flight Date May 2005
Spatial Domain Surrounding Tucson Area: Eastern Pima County  Southern Pinal County, Eastern Cochise County
Format Tiff/Tfw Image File Format 
Feature type raster
Resolution 0.5, 1, 2, 16 foot resolutions
Horizontal Control Arizona State Plane Central Zone NAD83 (international feet)
Source Pima Association of Governments

Orthophotos 2005 - Digital Terrain Models - DTMs

Name(s) DTM-Digital Terrain Models
Format ASCII Point files, based on 8.00 foot grids
Control NAD83(92 adjustment) and NGVD88 files provided in NGVD88
Accuracy Relates to standards for 1' = 200', 2.00 foot c.i. photogrammetric mapping (verticalss accuracy is +/- 0.5 feet on any given point of the dataset
File Specifications
  • DTM consist of line (.lf) , point (.pt) XYZ (East, North, Elevation)
  • DTM include breaklines, mass points and exclusion polygons
  • DTM file structure utilizes a number two (2) for breaklines and number eight (8) for exclusion polygons
  • DTM mass points collected at 8.00 foot intervals (Grid) using LiDAR 

Orthophotos 2005 - Digital Elevation Models - DEMs

Name(s) DEM-Digital Elevation Models
Format ASCII Point Files, based on 8.00 foot grid spacing
Control NAD83(92 adjustment) and NGVD88 files provided in NGVD88
Accuracy Relates to standards for 1' = 200', 2.00 foot c.i. photogrammetric mapping (vertical accuracy is +/- 0.5 feet on any given point of the dataset
File Specifications
  • DEM should not be utilized to create contours
  • DEM are line (.lf) files only
  • DEM collected at 8.00 foot intervals

Orthophotos 2005 - LIDAR Elevation Data

Name(s) 2005 LiDAR Data Set
Format ASCII Point files, LAS format
Control 2005 Project Ground Control
Accuracy and File Specifications 
  • Flight Height: 1,200m
  • 3.3 Feet mass point grid
  • Bare Earth, Vegetation/Building, Point Cloud data set

Orthophotos 2005 - 2.00 foot Contours

Name(s) 2.00 foot Contours
Creation Date Created with delivered imagery
Spatial Domain Outlying Tucson area; Unincorporated Pima County
Feature type Lines Features
Origination Contour created from DTMs
Horizontal/Vertical State Plane Coordinate System NAD83
Vertical control utilized:  NAVD88
VERTCON software utilized to obtain the orthometric height
Format ESRI shapefiles (shp)
AutoCad Rev14 drawings (dwg)
 

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