City of Scottsdale Digital Elevation
Data |
Scottsdale GIS bare ground digital elevation data are derived from aerial
photography acquired at various times from 1993 to the present. Different formats
are available, though not all quarter-sections are available in all formats. In some
cases, the elevation files incompletely cover the quarter-section. |
| View spreadsheet
(xls/184kb) to determine the availability and acquisition time of each
quarter-section. |
| Ordering information located at http://eservices.scottsdaleaz.gov/dmc/GISProducts/productintro.asp |
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Available Formats
(quarter-section basis):
Mass Point and Break Lines
ESRI TIN in .E00 format
ESRI GRID in .E00 format -- 10' square cells.
ESRI PolylineZ contour shapefiles -- elevation
attribute.
AutoCad 2000 DWG files -- polyline contour
layer contains elevation attribute.
Microstation DGN V8 files -- polyline contour
layer contains elevation attribute.
Microstation .DAT and .TTN files -- for the
1993 data only.
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Important Note
about Contours: Contour files contain 1' contour intervals. These are made
available for the convenience of our customers. HOWEVER, other than 1993, the contracted
specifications for the creation of these elevation files was for a lower resolution of
contour (see Specifications, below). Also, keep in mind that significant
change may have occurred in any given quarter-section since the data were acquired. Use
these files with discretion. They are not a substitute for proper field measurement.
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Specifications:
Elevation data created from aerial photography acquired in these years: 1993, 2000, 2001,
2003, 2005
1993: Flight scale: 1:4560 approx. Suitable
for 1' contours.
2000-2003: Flight scale: 1:9600 approx.
Suitable for 3'-5' contours
2005: Flight scale: 1:8400 approx. Suitable
for 2' contours.
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Process:
The process for creating elevation data is as follows:
Mass point and break line files derived from
stereo photo pairs are received from the aerial photo contractor.
The mass points and break lines are converted
to ESRI TINs on a quarter-section basis using ArcInfo software.
ESRI TINs are converted to ESRI GRIDs -- 10'
square cells.
ESRI TINs are converted to ESRI PolylineZ (3D)
contour shapefiles -- 1' contour interval.
ESRI shapefiles are converted to AutoCad 2000
DWG files.
AutoCad 2000 DWG files are converted to
Microstation DGN V8 files.
*Microstation .DAT and .TTN files from 1993
were created using Microstation/Intergraph software.
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Restrictions
Regarding Use: Scottsdale geographic data can
not be redistributed (sales, copies, etc.) in any form without written permission from the
City of Scottsdale. Buyers purchasing data specifically for resale or redistribution must
negotiate separate arrangements with the City of Scottsdale.
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NOTE: ALL DIGITAL DATA AND
MAPPING ORDERS REQUIRE 1 WEEK TO PROCESS
SCOTTSDALE DATA SALES DISCLAIMER:
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Restrictions Regarding Use: Scottsdale geographic data can
not be redistributed (sales, copies, etc.) in any form without written permission from the
City of Scottsdale. Buyers purchasing data specifically for resale or redistribution must
negotiate separate arrangements with the City of Scottsdale.
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Liability Issues: All City of Scottsdale geographic
data is provided for general information purposes only. The City of Scottsdale does not
warrant its accuracy, completeness, or its suitability for any particular purpose, and
will not be held liable for problems that arise due to poor data quality or content. It
should not be relied upon without proper field verification.
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Thank you for your interest in
Scottsdale's Geographic Information Systems!
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