Twin Cities Metro Area Road Surface Area
Go to Section:- Overview
- Data Quality
- Data Organization
- Coordinate System
- Attributes
- Distribution - Get Data
- Metadata Reference
Section 1: Overview
Originator:Minnepolis-St. Paul Long-Term Ecological Research
Title:
Twin Cities Metro Area Road Surface Area
Abstract:
This high-resolution (1 meter) raster represents road surface area for through streets (including alleys) in the seven-county Minneapolis-St. Paul Metropolitan Area. Minnesota roads data contributing to this layer is provided by several state and county agencies and accessed through the Minnesota Geospatial Commons. The Minnesota Transportation Department (MNDOT) Lane Information dataset was spatially joined with MNDOT centerlines from 2012 in order to link the Transportation Information System (TIS) ID codes for road segments with the lane information on number of through transit lanes and width of lanes. The resulting layer was then joined on the TIS code attribute with the Geospatial Advisory Council Schema road centerlines shapefile from MetroGIS. To avoid a many-to-one join, MNDOT road segments were grouped by their TIS code and the average lane width and number were summarized to make the layer compatible with the MetroGIS centerlines shapefile. Once the centerline route segment IDs were linked to the MNDOT transit lane information, the centerlines were buffered based on their average width attribute, multiplied by the number of lanes. Alleys were identified and assigned a width of 5 meters based on typical alley width measurements using satellite imagery. Due to transportation identification system scope, confidence in accuracy of private road surface area is diminished. The resulting buffered road segment vectors were rasterized and cropped to the seven-county metro area (Hennepin, Ramsey, Anoka, Washington, Dakota, Scott, and Carver County).
Purpose:
Calculating impervious surface in urban areas
Time Period of Content Date:
Road centerlines were published 03/03/2020 and accessed for use in this layer 3/1/2022. Roadway Lane Information was published in 2018 and is updated monthly, accessed on 2/17/2022 for use in this layer. Route IDs from the MNDOT roadway centerlines used to link lane information to the updated centerlines were from 2012.
Currentness Reference:
See associated data sets
Progress:
Complete
Maintenance and Update Frequency:
As needed
Spatial Extent of Data:
Twin Cities seven-county metropolitan area
Bounding Coordinates:
-94.01256
-92.73191
45.41455
44.47124
Place Keywords:
Minnesota, Minneapolis, St. Paul
Theme Keywords:
Roads
Theme Keyword Thesaurus:
Access Constraints:
None
Use Constraints:
None. Please check sources, scale, and accuracy in the area you plan to use the data. Note that accuracy of estimated road area can vary considerably by location. Please acknowledge the publisher. See section 6 for MNDOT's disclaimers and data use policies as it pertains to part of the data used to develop this layer.
Contact Person Information:
Mary Marek-Spartz,
Information Manager
Minneapolis-St. Paul Long-Term Ecological Research (MSP LTER)
UMN Twin Cities, Room 100 Ecology, 1987 Upper Buford Circle
St. Paul,
MN
55108
Phone: 612-625-5707
Email: patt0335@umn.edu
Browse Graphic:
None available
Section 2: Data Quality
Attribute Accuracy:
Logical Consistency:
Completeness:
Data provides complete coverage over the stated extent of the data.
Horizontal Positional Accuracy:
Unknown
Vertical Positional Accuracy:
NA
Section 3: Spatial Data Organization (not used in this metadata)
Section 4: Coordinate System
Horizontal Coordinate Scheme:
Universal Transverse Mercator
UTM Zone Number:
15
Horizontal Datum:
NAD83
Horizontal Units:
meters
Vertical Datum:
Vertical Units:
Depth Datum:
Depth Units:
Cell Width:
1
Cell Height:
1
Section 5: Attributes
Overview:
9 - Estimated road surface area
Detailed Citation:
Table Detail:
Section 6: Distribution
Publisher:
Mary Marek-Spartz
Publication Date:
Contact Person Information:
Mary Marek-Spartz,
Information Manager
Minneapolis-St. Paul Long-Term Ecological Research (MSP LTER)
UMN Twin Cities, Room 100 Ecology, 1987 Upper Buford Circle
St. Paul,
MN
55108
Phone: 612-625-5707
Email: patt0335@umn.edu
Distributor's Data Set Identifier:
tcma_rd_surface_area
Distribution Liability:
Complete accuracy of data sets cannot be guaranteed. All data are made available "as is" and without warranty. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data.
USE OF THIS DOCUMENT IS SUBJECT TO MNDOT'S DISCLAIMERS, LEGAL NOTICES AND POLICIES FOUND at www.dot.state.mn.us/information/disclaimer.html
Online Linkage:
None available
Section 7: Metadata Reference
Metadata Date:
01/05/2023
Contact Person Information:
Mary Marek-Spartz,
Information Manager
Minneapolis-St. Paul Long-Term Ecological Research (MSP LTER)
UMN Twin Cities, Room 100 Ecology, 1987 Upper Buford Circle
St. Paul,
MN
55108
Phone: 612-625-5707
Email: patt0335@umn.edu
Metadata Standard Name:
Minnesota Geographic Metadata Guidelines
Metadata Standard Version:
1.2