BasemapScanmaps_TOPO100KDRG

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey (USGS)
Publication_Date: 20000921
Publication_Time: unknown
Title: BasemapScanmaps_TOPO100KDRG
Edition: 2000
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: Vermont Topographic Maps (100K Edition)
Issue_Identification: 2000
Publication_Information:
Publication_Place: Waterbury VT 05676
Publisher: VT Center for Geographic Information
Other_Citation_Details: Tile Structure - QUAD16
Online_Linkage:
<http://www.vcgi.org/dataware/default.cfm?layer=BasemapScanmaps_TOPO100KDRG>
Online_Linkage:
<http://www.vcgi.org/dataware/default.cfm?layer=BasemapScanmaps_TOPO100KDRG&mapit=yes>
Description:
Abstract:
The Vermont Topographic Maps dataset (TOPOVT100K) is a raster image of a scanned USGS 1:100,000 scale topographic map excluding the collar information, georeferenced to the Vermont State Plane Coordinate System (NAD83). TOPOVT100K's were created from 1:100,000 USGS DRG (Digital Raster Graphic) image files.
Purpose:
A TOPOVT100K is useful as a source or background layer in a GIS, as a means to perform quality assurance on other digital products, and as a source for the collection and revision of DLG data. TOPOVT100K's can also be merged with other digital data, e.g. DEM's or DOQ's, to produce a hybrid digital file.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: Various
Time_of_Day: Unknown
Currentness_Reference: Publication Date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -73.454162
East_Bounding_Coordinate: -71.465281
North_Bounding_Coordinate: 45.018361
South_Bounding_Coordinate: 42.722789
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: imageryBaseMapsEarthCover
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Vermont Topographic Maps
Theme_Keyword: TOPOVT100K
Theme_Keyword: topographic map
Theme_Keyword: topo map
Theme_Keyword: DRG
Theme_Keyword: USGS topo
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Statewide
Place_Keyword: Vermont
Access_Constraints:
VCGI and the State of VT make no representations of any kind, including but not limited to the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the data.
Use_Constraints: None.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: VT Center for Geographic Information
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 58 South Main Street, Suite 2
City: Waterbury
State_or_Province: VT
Postal_Code: 05676
Country: USA
Contact_Voice_Telephone: 802/882-3000
Contact_TDD/TTY_Telephone: None
Contact_Facsimile_Telephone: 802/882-3001
Contact_Electronic_Mail_Address: info@vcgi.org
Hours_of_Service: 9am - 5pm, M-F
Data_Set_Credit: VCGI and USGS
Security_Information:
Security_Classification_System: N/A
Security_Classification: Unclassified
Security_Handling_Description: No Security Considerations
Native_Data_Set_Environment: Arc/Info
Cross_Reference:
Citation_Information:
Originator: USGS and VCGI
Publication_Date: Various
Publication_Time: unknown
Title: USGS 1:100,000 Topographic Maps
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Burlington VT 05405-0106
Publisher: GIS Database Administrator
Other_Citation_Details: USGS DRG
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The TOPOVT100K is an 8-bit color image that employs a color palette to ensure uniform colors throughout a particular DRG series. All TOPOVT100K's within a series must have the same RGB value.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Consistent with USGS 1:100,000 standards
Attribute_Accuracy_Explanation: USGS Standards
Logical_Consistency_Report: Not Applicable
Completeness_Report:
The original USGS DRG is a faithfully reproduced digital image of the original source map. Some differences may be detected between the source graphic used and the DRG due to the RGB values assigned that particular color. The intent is to recreate those colors as near as possible. Data completeness for DRG files reflect content of the source graphic. Features may have been eliminated or generalized on the source graphic due to scale and legibility constraints. For information on collection and inclusion criteria, see U.S. Geological Survey, 1994, Standards for 1:100,000-Scale Digital Line Graphs and Quadrangle Maps: National Mapping Program Technical Instructions and U.S. Geological Survey, 1994, Standards for Digital Line Graphs: National Mapping Program Technical Instructions. VCGI's conversion of DRGs included removal of map collars, re-projection to Vermont State Plane Coordinate System (NAD83), and "merging" with adjacent tiles to create "seamless" images. NOTE: Every effort was made to minimize "sliver" problems between adjoining images. However, these problems do exist, and is one of the constraints of this dataset. VCGI is not responsible for problems in the original DRG or "sliver" problems created during edge-matching.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: None available
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 0.000
Horizontal_Positional_Accuracy_Explanation: Fuzzy Tolerance
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 0.00
Horizontal_Positional_Accuracy_Explanation: Dangle
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: USGS
Publication_Date: various
Publication_Time: unknown
Title: 1:100000 USGS Topographic Maps
Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: 1:100000 USGS Topographic Maps
Issue_Identification: 1.0
Publication_Information:
Publication_Place: Reston, VA
Publisher: USGS
Other_Citation_Details: TOPO
Online_Linkage: <http://www.usgs.gov>
Source_Scale_Denominator: 100000
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: various
Time_of_Day: Unknown
Source_Currentness_Reference: Publication Date
Source_Citation_Abbreviation: TOPO
Source_Contribution: The source map is scanned to produce the DRG.
Process_Step:
Process_Description:
The USGS DRG production procedures, instrumentation, hardware, and software used in the collection of standard DRG products vary depending on systems used at the contract, cooperator or USGS production sites. The majority of DRG data sets are acquired through government contract. The process step describes, in general, the process used in the production of standard DRG data sets. 1. Production of a DRG begins with the scanning of a paper 7.5-minute topographic map (map1) on a high-resolution scanner. Scanning resolutions range from 500 - 1000 dpi with the output file running between 160-300 mb. 2. Removal of screens (descreening) and color quantization to reduce the number of colors also takes place during the scanning phase. 3. The raw scan file is then transformed and georeferenced using UTM coordinates of the sixteen 2.5-minute grid ticks, which are obtained using the in-house produced program COORDAT and stored in a ground control file. Those sixteen 2.5-minute ticks are interactively visited and assigned their respective UTM coordinates. USGS program XSHAPES4 then performs a piecewise linear rubber sheet transformation. 4. An output resolution of 10.15 meters is chosen in order to resample the file to 250 dpi. 5. The image file is converted to a TIFF and further reduced by converting the file to a run length encoding Packbits compression(type 32773). 6. The color palette of the compressed DRG is then standardized by replacing the original RGB values assigned during the scanning process with standard RGB value combinations using the in-house produced TIFFREMAP program. 7. Prior to archiving the DRG undergoes the following quality assurance procedures: a. The color index values of each DRG are checked to ensure the RGB combinations are consistent with the standardized color palette. b. All DRG files are inspected to ensure that they are geometrically consistent with normal map presentation. c. Selected DRG's are checked to ensure that data elements in the DRG metadata file correspond to the map collar information and to the information in the associated image file. d. Selected DRG's are checked for georeferencing accuracy by comparing the book value of latitude and longitude tick marks with corresponding tick intersections in the DRG image. e. Transformations are checked on selected DRG's by comparing the positions of well defined points, such as UTM grid intersections in the graphic product, with the corresponding image points in the DRG. USGS DRG production specifications are available on request from the National Mapping Division and Mid-Continent Mapping Center by contacting: Rolla-ESIC U.S. Geological Survey 1400 Independence Rd., MS231 Rolla, MO 65401-2602 Phone (573)308-3500 Facsimile (573)308-3615 E-mail to mcmcesic@usgs.gov World Wide Web: <http://mcmcweb.er.usgs.gov/drg/> 8. VCGI processing the orginal DRGs into the TOPOVT product format as follows: a. Converted DRG TIFF files to Arc/Info GRID format b. Removed map collars be cropping to vector polygon boundaries captured from LAT/LONG coordinates for USGS quadrangles. Used Arc/Info GRID "selectpolygon" command. c. Used Arc/Info PROJECT command to re-project from UTM NAD27 to Vermont State Plane NAD83 (cell size set to 10.15) d. Used Arc/Info GRID "merge" function to merge with
Process_Step:
Process_Description:
VCGI discontinued the TOPOVT100K CD product and instead posted the data for download on the VGIS Data Warehouse. Packaged the TIF files, posted to VGIS Data Warehouse, and revised metadata to reflect the change.
Process_Date: 20080226
Process_Time: Unknown
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Steve Sharp
Contact_Organization: VCGI
Contact_Position: GIS Database Administrator
Spatial_Data_Organization_Information:
Indirect_Spatial_Reference: TIFF
Direct_Spatial_Reference_Method: Raster
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type:
Point_and_Vector_Object_Count:
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: 4400
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999964
Longitude_of_Central_Meridian: -72.500000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.001
Ordinate_Resolution: 0.001
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 1 / 298.25722210
Entity_and_Attribute_Information:
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: VT Center for Geographic Information
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 58 South Main Street, Suite 2
City: Waterbury
State_or_Province: VT
Postal_Code: 05676
Country: USA
Contact_Voice_Telephone: 802/882-3000
Contact_TDD/TTY_Telephone: None
Contact_Facsimile_Telephone: 802/882-3001
Contact_Electronic_Mail_Address: info@vcgi.org
Hours_of_Service: 9am - 5pm, M-F
Resource_Description: BasemapScanmaps_TOPO100KDRG
Distribution_Liability:
VCGI and the State of Vermont make no representations of any kind, including but not limited to the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the data.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: SHP
Format_Specification: ESRI Shapefile format (compressed into ZIP file format)
Format_Information_Content: geospatial data
File_Decompression_Technique: ZIP extraction tool
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<http://www.vcgi.org/dataware/default.cfm?layer=BasemapScanmaps_TOPO100KDRG>
Access_Instructions: Download from web site.
Offline_Option:
Offline_Media: CD-ROM
Offline_Option:
Offline_Media: 3-1/2 inch floppy disk
Offline_Option:
Offline_Media: 4 mm cartridge tape
Fees:
No charge when downloading from the internet, and when no custom processing is required.
Ordering_Instructions:
Download from web site or mail-fax a copy of the VCGI 'Data Request Form' which is available from the VGIS web site <http://www.vcgi.org/dataware/order_forms>
Turnaround: About 5 days.
Custom_Order_Process:
Mail or Fax a copy of the VCGI 'Data Request Form' which is available from <http://www.vcgi.org/dataware/order_forms>
Technical_Prerequisites: ESRI Arc/Info, ArcView, or ArcExplorer software.
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20080226
Time_of_Day: Unknown
Metadata_Reference_Information:
Metadata_Date: 20080226
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: VT Center for Geographic Information
Contact_Person: GIS Database Administrator
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 58 South Main Street, Suite 2
City: Waterbury
State_or_Province: VT
Postal_Code: 05676
Country: USA
Contact_Voice_Telephone: 802/882-3000
Contact_TDD/TTY_Telephone: None
Contact_Facsimile_Telephone: 802/882-3001
Metadata_Standard_Name: FGDC Content Standards for Digital Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: Local time
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None
Metadata_Security_Information:
Metadata_Security_Classification_System: N/A
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: No security considerations
Generated by mp version 2.9.5 on Wed May 13 13:46:24 2009