Metadata for Montana 2010 Population Density 1-km grid Metadata for Montana 2010 Population Density 1-km grid

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Identification Information:

Citation:

Originator: Montana State Library
Publication date: 03/17/2011
Title: Montana 2010 Population Density 1-km grid
Online linkage: https://ftpgeoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Collections/Census/dens2010.zip

Browse graphic file name: https://ftpgeoinfo.msl.mt.gov/Documents/Maps/Thumbnails/20131204_666_thumb.jpg
Browse graphic file description: Thumbnail of Montana 2010 Population Density map

Browse graphic file name: https://ftpgeoinfo.msl.mt.gov/Documents/Maps/Individual/20131204_666_PopDens2010.jpg
Browse graphic file description: Montana 2010 Population Density map

Abstract:

Population density, in persons per square mile, of Montana from the 2010 Census. This data is a smoothed-over representation of Montana's population density surface, designed to emphasize small areas with high population density. It was derived from U.S. Census Bureau 2010 TIGER files and population counts.

The original data was resampled to a 100-meter grid, smoothed, and the highest resulting density of the 100-meter cells in each 1-kilometer grid cell was assigned to the cell.

When comparing this data set to the similar data set available from the State Library for the 2000 and 1990 Censuses, it is important to realize that the change of population density at a location is likely to be the result of a change in the configuration of the Census Blocks rather than a change in population density. The 2010 Census Block data is available at https://ftpgeoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Collections/Census/cblock2010.zip.

Time period of content:

Calendar date: 2010
Currentness reference: ground condition

Status:

Progress: Complete

Access constraints: None

Use constraints:

The Montana State Library provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time.

Point of contact:

Montana State Library
PO Box 201800
Helena, MT 59620-1800
Telephone: 406-444-5354
TDD/TTY telephone: Montana Relay 711
Fax: 406-444-0266
E-Mail: geoinfo@mt.gov

Data Quality Information:

Attribute accuracy report:

Population is only known for U.S. Census Bureau Census Block areas, rather than continously, as someone might construe from this data set. The population density for a given location is a number equal to or smaller than the density of the most dense Census Block in the nearest 1000 meters. The actual population density at a given location may be much lower or higher, if the location is in an area farther from or closer to most of the people in a Census Block

Lineage:

Source information:

Originator: U.S. Census Bureau
Originator: Montana State Library
Publication date: 03/16/2011
Title: Montana Census Blocks with Population Data, 2010
Online linkage: http://mslapps.mt.gov/Geographic_Information/Data/DataList/datalist_Details.aspx?did={6874ffaa-1e8f-48e5-8029-bad7511ce710}
Source contribution: The data is a smoothed, rasterized version of this source.
Calendar date: 2010

Process step:

Convert vector Census Block data to 100-meter grid cells based on population density.

ESRI Geoprocessing command:
PolygonToRaster cblock2010 Density grid1 MAXIMUM_AREA NONE 100


Process date: 03/17/2011

Process step:

Smooth the data by setting the value of each cell equal to the mean value of the cell and its 80 neighbors:

ESRI Geoprocessing Command:
FocalStatistics grid1 s2 "Rectangle 9 9 CELL" MEAN DATA


Process date: 03/17/2011

Process step:

Emphasize high-density areas by assigning each cell the density of the highest of the 80 neighboring cells.

ESRI Geoprocessing Command:
FocalStatistics s2 s3 "Rectangle 9 9 CELL" MAXIMUM DATA


Process date: 03/17/2011

Process step: