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Automatic Road Analyzer (ARAN) van road GPS points collected 2008-2015

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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 date of last update may not be up-to-date. All metadata is subject to errors inherent in a manual process.


Descriptive nameAutomatic Road Analyzer (ARAN) van road GPS points collected 2008-2015
File namestvanppp
Spatial domainPima County
AbstractAs the van is driven, a data point is captured every 26.4 feet by GPS, along with 2 image frames for each point. International Roughness Index (IRI) and Pavement Surface Evaluation and Rating (PASER) data is attributed to each data point, with IRI automatically captured by a sensor, and PASER data input by the van personnel. Data points are captured from driving in both directions, when not driving on a one-way road, therefore data points are available for both sides of a road.
Known errors/qualificationsThis is a combination of 4 separate layers (stvl2010, which was made of '08,'09,'10 local points, stvm2009, stvm2011, and HPMS15). All layers were appended to a new layer, a SOURCE field was added and populated with the source, e.g. AV2008LC. An algorithm was written to assign a ROADID to each van point using a combination of matching the Route field with the STREET field and then using the NEAR command for the remaining points. A python script was then run to remove all but the most recent points for each unique ROADID segment, a ratio of Total Points per road segment / Length of segment > 0.035 was used. Additionally, Dave Cummings at PCDOT provides PASER values for roads that have been improved via the Pavement Preservation Program since the latest van run and the source field is populated to PSRDAVE and DATE field calculated to the date the improvement was completed. Layer name in EIM Themed MapGuide Map is PASER MS&Rs Residentials (2008-2015).
Feature typepoint
Feature count 1,188,471
Thumbnail Map stvanppp.pdf PDF file format   (16,417,307 bytes, PDF created 07/20/2022 )
ProjectionNAD83 HPGN (Parameters)
RectificationGPS
Field/value metadata Field metadata
Source organizationCity of Tucson
Source contact
Source document or file name
Source date2011
Source scale
Source formatUnknown
Date of last data update
(This date may not be current.)
20170530
Last data update byRay Brice
Date/time last touched - Meaning? 2021-02-08  11:39 PM - Enterprise GDB
  2021-02-08  11:03 PM - Shapefile - Library input format
  See coverage files, if any, for date.
LineagePCDOT pavement management (PM) data is stored and retrieved from the CarteGraph system. The PM data is stored by road segment within CarteGraph, and brought into the GIS through the implementation of a Linear Referencing System (LRS)/Dynamic Segmentation (DynSeg). An LRS/DynSeg allows the PM data to be integrated into the GIS without the need to modify the underlying geometry of the road network. The GIS road network's geometry is segmented from intersection to intersection, and PM segments can span multiple GIS segments and/or stop and begin at a distance that is offset from an intersection.
On maintenance?No
Maintenance organization
Maintenance description
Original conversion bySteve Whitney
Pima County ITD GIS contactSteve Whitney
Alternate Pima County ITD GIS contacte-mail address
On  Pima County Geospatial Data Portal? No

See Metadata Field Descriptions.
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