The manmade structures data sets were generated for the Front Range Infrastructure Resources (FRIR) Project as a base cartographic layer. The dataset contains the project's 45 1:24,000-scale quadrangle demonstration area that covers the Front Range of Colorado, south from Ft. Collins to the southern portion of Denver metropolitan area (not including Highlands Ranch, Douglas County); and west from Denver International Airport to the eastern foothills of the Rocky Mountains. For more information on this project, visit the Colorado Front Range Infrastructure Resources Project web site: http://rockyweb.cr.usgs.gov/frontrange/datasets.htm Procedures involved in compiling the manmade structures data include (1) obtaining 1 meter digital imagery and ancillary data for collecting, interpreting, and classifying the manmade structure features, (2) compiling the Digital Line Graph (DLG) vector data by 1:24,000-scale USGS quadrangle tiles, (3) merging the 1:24,000-scale quadrangle tiles into one seamless data set, and (4) translating and reattributing the features into user-friendly data sets. The translated attribution is described below in the Supplemental_Information section.
The demand for GIS data has increased recently, especially in rapidly growing metropolitan areas. Many state, regional, and local planning agencies require up-to-date manmade structure and other cartographic base information for various applications including modeling urban growth, determining land suitability for future development, monitoring land use changes and impacts on the environment, understanding land use patterns, and developing policies that could encourage or discourage certain land use zoning. Base cartographic layers are part of the USGS FRIR project cooperative effort to provide qualitative and quantitative information about infrastructure (aggregate, energy, water, habitat) features needed by growing urban regions like the Denver metropolitan area. The objective of the project is to develop GIS information about manmade features and other themes in such a way that decision makers can use this information to make land use planning decisions, growth models and will be used by the project scientists for multiple studies of the changing landscape of the Front Range and the impact on various resources. In addition to manmade structures, the USGS has created six other base cartographic layers consisting of: roads (FRIRD), miscellaneous transportation (FRIMT), railroads (FRIRR), hydrography (FRIHY), public land survey system (FRIPL), and boundaries (FRIBD). There are two manmade structures data sets, FRIMS contains line and polygon attributed features and FRIMSX contains point attributed features. The data layers are available at http://rockyweb.cr.usgs.gov/frontrange/datasets.htm
CODES: MANMADE STRUCTURES OVERLAY This document lists the codes specific to the manmade structures coverage as they pertain to item fields. The original classification system is taken from DLG major/minor attribute codes. The CAT item specifies the overlay type and takes the place of DLG major codes. See http://rockyweb.cr.usgs.gov/nmpstds/dlgstds.html for the complete document of DLG attributes. Field Definitions: CAT Theme Category PIC Primary Identification Code DSC Descriptive Code LABEL Feature Definition MATT Redefined PIC and DSC Codes into one field SAMPLE .AAT INFO FILE CAT =20 manmade structures category PIC =435 levee DSC =999 no DSC codes Label = levee ** REDEFINED ITEMS ** MATT =435999 combination of PIC and DSC -------------------- !! ATTENTION !! NEATLINE: designated by PIC and DSC codes of 777 Null values: '9's are used to fill in blank fields -------------------- ** PIC codes for NODES: none ** PIC codes for LINE features: PIC Definition PIC Definition 212 recreational slide 214 drag strip ** PIC codes for POLYGON features: PIC Definition PIC Definition 100 church complex 101 school campus 102 hospital complex 103 orphanage 104 prison compound 105 trailer park 120 ski area 122 athletic field 123 golf course 124 shopping center 125 zoo 127 racetrack or raceway 150 built-up urban area 162 refinery/industrial area 181 feedlot 182 experimental farm 184 firing range ** PIC codes for POINT features: PIC Definition PIC Definition 301 historical marker 302 mine tunnel/cave entrance 303 mine shaft 304 prospect 305 tower 306 burner stack 307 drilled well 311 drill hole ** PIC codes for MULTIPLE ELEMENT: attributes that can be applied to LINE,POLYGON,OR POINT features. PIC Definition PIC Definition 400 building 402 church 403 school 405 courthouse 406 post office 407 city or town hall 408 hospital 416 memorial 417 firehouse 418 library 420 cemetery 421 sewage disposal plant 422 waterworks 424 drilled well field 425 tank 427 mine dump 428 open pit mine 429 quarry 430 strip mine 432 pit, unconsol. material 433 radio or TV facility 435 levee 445 fairgrounds 446 rodeo grounds 448 boat ramp 449 campground, site 451 swimming pool 452 archaeological site, ruin 453 rec. area, public use area 454 picnic area 455 port of entry 456 stadium 457 arena 458 armory 459 orphanage 462 grain elevator 465 breakwater, jetty/pier/ dock/wharf/causeway ** DSC codes: descriptive code of PIC codes. DSC Definition DSC Definition 609 gravel 610 sand 611 clay 614 lookout 629 navigation
The imagery used in the interpretation of manmade structures was 1997 digital orthorectified imagery.
This data was collected from 1-meter resolution orthorectified scanned imagery (1997). The IFSAR imagery was used for horizontal accuracy. The data is revised from the original DLG vector data that was collected at 1:24000-scale within the 40 foot map accuracy standards. See DLG standards at (http://rockyweb.cr.usgs.gov/nmpstds/dlgstds.html) The data was collected for government use and represents the results of data collection for a specific activity. USGS makes no representation as to the suitability or accuracy of the data for any other purpose and disclaims any liability for errors that the data may contain. As such, it is only valid for its intended use, content, time, and accuracy specifications. While there are no explicit constraints on the use of the data, please exercise appropriate and professional judgment in the use and interpretation of this data. Acknowledgment of the U.S. Geological Survey would be appreciated for products derived from this data.
U.S. Geological Survey, Rocky Mountain Mapping Center, Denver Federal Center Bldg 810, P.O. Box 25046, MS 516
The final editing and structuring of these data sets were completed by the FRIR project members at the Rocky Mountain Mapping Center.
The attribution for the manmade structures data was verified for consistency throughout the demo project area. Check plots were used to compare attribution and spatial extent with the photography. See Part 3, Attribute Coding of Standards for Digital Line Graphs at (http://rockyweb.cr.usgs.gov/nmpstds/dlgstds.html) See Entity_and_Attribute_Information and Supplemental_Information
Polygon and chain-node topology present. All areas are closed polygons containing one label point. The data sets will have an unattributed polygon if not a manmade structure feature. See Supplemental_Information
Manmade Structures feature density consists of buildings, urban build-up, and manmade related structures with the exception of transportation and transmission networks. The region is considered a representative pattern (feature density) with capture conditions according to USGS 1:24000 mapping standards. Use of this data at larger scales may be incomplete. Urban build-up was delineated by extent of manmade structure density. Polygons smaller than 50 ft. were collected as point features in Coverage FRIMSX. Point features e.g.- some smaller structures, mine shafts, prospects, campsites, tanks are collected in the FRIMSX coverage. See capture conditions in Part 2-Built-up (DLG-F), and Standards for Digital Line Graphs at (URL:http://rockyweb.cr.usgs.gov/nmpstds/dlgstds.html)
The Manmade Structure vector data is within 40 ft. to the ground planimetry. The original data is from a mosaic of photorevised 1:24000-scale DLGs derived from stable-base 1:24000-scale USGS topographic maps. Digital orthorectified imagery at a 1-meter resolution was used to collect features. Magnitude imagery from IFSAR (Interferometric Synthetic Aperture RADAR), with a horizontal accuracy of 2.5 meters and vertical accuracy of 2.0 meters, was used to verify horizontal placement of the features. The IFSAR imagery was collected by Intermap Technologies. See National Map Accuracy Standards at (URL:http://mapping.usgs.gov/standards/).
Imagery was used to manually interpret and classify the Manmade Structure's features.
Interpretation/Compilation - Features were visually identified, interpreted, and classified according to the USGS DLG Limited Update Standards except that data was collected so that 90 per cent of the well-defined features are within 40 ft. to the ground planimetry. The data is interpreted and compiled in blocks of 1:24,000-scale quadrangles. The data is interpreted and compiled in blocks of 1:24,000-scale quadrangles. Once completed the data is edge-matched and paneled together into the seamless demonstration area. Final review of the data was to verify attribution, add additional attribution, and move features to geographically match the imagery.
FRIMS items are used to describe the physical and cultural characteristics of line and polygon elements. Attribute codes are used to reduce redundant information, provide enough reference information to support integration with larger data bases, and describe the relationships between cartographic elements. See Supplemental_Information for item definitions. FRIMS.PAT: COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME 1 AREA 8 18 F 5 9 PERIMETER 8 18 F 5 17 FRIRHY# 4 5 B - 21 FRIRHY-ID 4 5 B - 25 CAT 2 2 I - 27 PIC 3 3 I - 30 DSC 3 3 I - 33 LABEL 50 50 C - ** REDEFINED ITEMS ** 27 MATT 6 6 I - FRIRMS.AAT: COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME 1 FNODE# 4 5 B - 5 TNODE# 4 5 B - 9 LPOLY# 4 5 B - 13 RPOLY# 4 5 B - 17 LENGTH 8 18 F 5 25 FRIRMS# 4 5 B - 29 FRIRMS-ID 4 5 B - 33 CAT 2 2 I - 35 PIC 3 3 I - 38 DSC 3 3 I - 41 LABEL 50 50 C - ** REDEFINED ITEMS ** 35 MATT 6 6 I - FRIMSX items are used to describe the physical and cultural characteristics of point elements. Attribute codes are used to reduce redundant information, provide enough reference information to support integration with larger data bases, and describe the relationships between cartographic elements. See Supplemental_Information for item definitions. FRIMSX.PAT: COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME 1 AREA 8 18 F 5 9 PERIMETER 8 18 F 5 17 FRIRMSX# 4 5 B - 21 FRIRMSX-ID 4 5 B - 25 CAT 2 2 I - 27 PIC 3 3 I - 30 DSC 3 3 I - 33 LABEL 50 50 C - ** REDEFINED ITEMS ** 27 MATT 6 6 I -
CAT Theme Category (DLG Manmade Structures = 200) PIC Primary Identification Code DSC Descriptive Code LABEL Feature Definition MATT Redefined PIC and DSC Codes into one field
Rocky Mountain Mapping Center, Denver Federal Center Bldg. 810 Box 25046, MS 516
Contact via email (FAX 303-202-4354)
Although this dataset has been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials.
Front Range infrastructure resources manmade structures geographic features
Front Range infrastructure resources manmade structures geographic features
ArcIMS Image Map Service
A web-based interactive mapping system that accesses an ArcIMS Map Service running on certmapper.cr.usgs.gov.
Rocky Mountain Mapping Center Denver Federal Center Bldg 810 P.O. Box 25056, MS 516