Montana State Library 19931119 map Helena, Montana Montana State Library The former name of the data set on the NRIS web site was "oc39" https://ftpgeoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Collections/Census/dens1990.zip Montana Population in persons per square mile from the 1990 Census. Derived from U.S. Census Bureau TIGER files and population counts. The original data was smoothed, and the highest resulting density in each 1-kilometer grid cell was assigned to the cell. 19900401 Ground Condition Complete -115.613403 -103.607300 49.0410995 44.2378998 -116.0748825073,49.02441787719,-116.0513381958,47.93949127197,-115.7472457885,47.45859146118,-114.6641998291,46.60823059082,-114.424659729,46.61886978149,-114.5483016967,45.60388565063,-114.3186950683,45.43321228027,-113.9458312988,45.58434677124,-113.5072631835,44.86284637451,-112.8395233154,44.31266784668,-110.9373550415,44.44471740722,-110.950553894,44.95633697509,-108.1549987793,44.98777389526,-103.8922653198,44.98892211914,-103.7473602294,49.05199050903,-109.5802764892,49.08559036254,-116.0748825073,49.02441787719 ISO 19115 Topic Category society population Census demographics Montana None 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. Montana State Library mailing address

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Helena Montana 59620-1800 406-444-5354 Montana Relay 711 406-444-0266 geoinfo@mt.gov https://ftpgeoinfo.msl.mt.gov/Documents/Maps/Thumbnails/19900401_600_thumb.jpg Thumbnail image of Montana 1990 Population Density map https://ftpgeoinfo.msl.mt.gov/Documents/Maps/Individual/19900401_600_1990_MTPopDensity.gif Montana 1990 Population Density map U.S. Census Bureau 1990 Census map Washington, DC U.S. Census Bureau 100000 1990 Publication Date TG90 This is the source of the Census Block boundaries that were used to calculate the population density denominator. U.S. Census Bureau 19900401 other Washington, DC U.S. Census Bureau 19900401 Publication Date PL94 This is the source of the population counts per Census Block that formed the numerator of the population densities. Convert 57 Montana TIGER files to Arc/Info format, dissolve polygons to create Census Blocks, and relate Census Block numbers to the Public Law 94-171 files. TG90 PL94 19911012 s1 Convert 57 Census Block coverages to 100m grid cells based on population density. Set the value of each cell to be the mean value of each cell and its 81 nearest neighbors. Arc/Info command: s2 = focalmean (s1,rectangle,9,9) s1 19931118 s2 Assign each cell the density of the highest of the 81 nearby cells. Arc/Info command: s3 = focalmax (s2,rectangle,9,9) s2 19931118 s3 Resample the data from 100 meter resolution to 1000. Arc/Info commands: setcell 1000, s4 = s3. Join the 57 counties into a single data set with the "merge" command. s3 19931118 s4 Raster Grid Cell 531 919 State Plane Coordinate System 1983 2500 45 49 -109.5 44.25 600000.00000 0.00000 row and column 1000 1000 meters North American Datum of 1983 Geodetic Reference System 80 6378137 298.257 Montana State Library mailing address

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Helena MT 59620-1800 406-444-5354 406-444-5354 Montana Relay 711 406-444-0266 geoinfo@mt.gov geoinfo@mt.gov Downloadable Data 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. GeoTIFF and ESRI Shapefile https://ftpgeoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Collections/Census/dens1990.zip 20140122 20130417 20040929 20011105 19970305 19931227 Montana State Library mailing address

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Helena Montana 59620-1800 406-444-5354 Montana Relay 711 406-444-0266 geoinfo@mt.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 {990315AE-E68A-44B9-9A67-FC4834681808}