Identification_Information: SMMS_Type: 1 Citation: Citation_Information: Originator: U.S. Geological Survey (USGS), Maine Office of Geographic Information Systems (MEGIS) (comp.)(ed.) Publication_Date: 19991231 Title: drgclip Geospatial_Data_Presentation_Form: raster digital data Series_Information: Series_Name: Maine GIS Issue_Identification: SDE server; Internet Data Catalog Publication_Information: Publication_Place: Augusta ME Publisher: Maine Office of Geographic Information Systems Other_Citation_Details: 1:24000 Maine Office of Geographic Information Systems (MEGIS) has developed a set of collarless DRGs. The process applied by MEGIS is described in FGDC metadata for DRGCLIP. Publication date is unique to each quadrangle in the map series, additional information on the source dates of USGS DRGs used to develop DRGCLIPs for Maine can be found in .dbf and comma delimited text format at http://megis.maine.gov/catalog/ "Tables" link. For additional information contact MEGIS at 1-207-287-6144. Online_Linkage: http://megis.maine.gov/catalog/ SMMS_Citation_Linkages_Hyperlinked: true SMMS_Citation_Source_Scale: 24000 SMMS_Citation_Source_Media: online SMMS_Citation_Source_Time_Period: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19480101 Beginning_Time: Unknown Ending_Date: 19951231 Ending_Time: Unknown SMMS_Citation_Source_Currentness: source dates Description: Abstract: DRGCLIPs are collarless digital raster graphics (DRGs), produced from 1:24,000 USGS DRGs covering all of Maine. These are .TIFF format images of US Geological Survey (USGS) 7.5 minute series topographic maps, clipped from USGS Digital Raster Graphics (DRGs) for Maine. DRGCLIPs do not include map collar information. Each image represents the area, of a USGS DRG, inside the map neatline and is georeferenced to the surface of the Earth. DRGCLIPs retain, from the USGS DRG source, the associated .tfw files and the GeoTIFF 0.2 specifications that define a set of TIFF tags. The tags describe all cartographic information associated with the source file. This GeoTIFF information now contains the UTM projection and the NAD83 datum. DRGCLIPs retain the 8-bit color image of the USGS DRGs. USGS DRGs employ a standardized color palette to ensure uniform colors throughout. Purpose: DRGs can be used to collect, review, and revise other digital data. When the DRG is combined with other digital products, such as digital orthophoto quadrangles (DOQ) or digital elevation models (DEM), the resulting image provides additional visual information for the extraction and revision of base cartographic information. It can also be used to produce "hybrid" products. These include combined DRGs and DOQs for revising and collecting digital data, DRGs and DEMs for creating shaded-relief DRGs, and combinations of DRG, DOQ, and DLG data. Although a standard DRG is an effective mapping tool, its full potential for digital production is realized in combination with other digital data. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19480101 Beginning_Time: Unknown Ending_Date: 19951231 Ending_Time: Unknown Currentness_Reference: source dates Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -71.3 East_Bounding_Coordinate: -66.8 North_Bounding_Coordinate: 47.6 South_Bounding_Coordinate: 42.9 Keywords: Theme: Theme_Keyword_Thesaurus: Maine GIS Thesaurus-Theme Theme_Keyword: digital raster graphics Theme_Keyword: topographic map images Theme: Theme_Keyword_Thesaurus: ISO Keyword Thesaurus Theme_Keyword: imageryBaseMapsEarthCover Place: Place_Keyword_Thesaurus: Maine GIS Thesaurus-Place Place_Keyword: Maine Place_Keyword: Gulf of Maine Place_Keyword: United States Stratum: Stratum_Keyword_Thesaurus: GCMD Parameter Keyword Stratum_Keyword: human dimensions Access_Constraints: Secondary distribution by permission only. Please see Maine Office of Geographic Information Systems (MEGIS) License Agreement at http://megis.maine.gov/ . Any secondary distribution must have this documentation appended. Use_Constraints: Users must assume responsibility in determining the usability of this data for their purposes. Digital maps retain the accuracy of their source materials. The best use of data mapped at scales of 1:500,000 and 1:250,000 is in statewide planning and studies; at 1:100,000 in regional planning and studies; at 1:62,500 and 1:24,000 in detailed studies and local planning; and at 1:12,000 and 1:5,000 or larger scales in parcel level studies and detailed local planning. In the use of Maine GIS data, please check sources, scale, accuracy, currentness and other available information. Please confirm that you are using the correct copy of both data and metadata from the Maine GIS Data Catalog. The Maine Office of Geographic Information Systems (MEGIS) provides notice of updates and corrections directly to the Maine GIS Technical Group and Maine GIS Users, through the MEGISTECH and MEGISUSER list servers. To subscribe please contact MeGIS through the Maine Office of Information Technology (OIT) Customer Support Center (CSC) at (207) 624-7700. To request data correction in, or provide updates to Maine GIS data, please use the contact information contained in the metadata. Updates, corrections, and feedback, incorporated in the Maine GIS database are made in accordance with "Data Standards for Maine Geographic Information Systems", 2002, and coordinated by MEGIS in consultation with the Maine GIS Executive Council. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: (MEGIS) Maine Office of Geographic Information Systems Contact_Position: GIS Coordinator Contact_Address: Address_Type: mailing address Address: State House Station 145 City: Augusta State_or_Province: ME Postal_Code: 04333-0145 Country: USA Contact_Voice_Telephone: (207) 624-7700 Contact_Facsimile_Telephone: (207) 287-3842 SMMS_Contact_Email_Hyperlinked: false Hours_of_Service: Monday through Friday 0800 - 1700 EST Data_Set_Credit: Credit should always be given to the data source and/or originator when the data is transferred or printed. Native_Data_Set_Environment: Maine Office of Information Technology (OIT) Oracle 9i, Maine Office of Geographic Information Systems (MEGIS), Maine GIS SDE, SDEUSER, SDE.DEFAULT, Maine GIS Internet Data Catalog http://megis.maine.gov/catalog/, Maine GIS ArcIMS http://megisims.state.me.us/website/basemap/viewer.htm, Maine GIS server ArcInfo version 9, Solaris 9, pathname = /home23/drgs/24k//drgclip, file size ~6.5 MB Cross_Reference: Citation_Information: Originator: U.S. Geological Survey (USGS) Publication_Date: 20000901 Title: DRGMETA Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: Maine GIS Issue_Identification: SDE server; Internet Data Catalog; Tables Publication_Information: Publication_Place: Augusta ME Publisher: Maine Office of Geographic Information Systems (MEGIS) Online_Linkage: http://megis.maine.gov/catalog/ SMMS_Citation_Linkages_Hyperlinked: false SMMS_Dataset_Capture_Browse: false SMMS_Dataset: SMMS_DatasetLayer: SMMS_DatasetLayer_Order: 0 SMMS_DatasetLayer_Type: 9 SMMS_DatasetLayer_Location: \\bis-isa1AS2GIS\HOME23\drgs\24k\bangor SMMS_DatasetLayer_Name: drgclip.tif SMMS_DatasetLayer_LabelVisible: 0 SMMS_DatasetLayer_LabelAttribute: 24k SMMS_DatasetLayer_Style1: 0 SMMS_DatasetLayer_Color: 0 SMMS_DatasetLayer_Weight: 0 SMMS_DatasetLayer: SMMS_DatasetLayer_Order: 1 SMMS_DatasetLayer_Type: 0 SMMS_DatasetLayer_LabelVisible: 0 SMMS_DatasetLayer_Style1: 0 SMMS_DatasetLayer_Color: 0 SMMS_DatasetLayer_Weight: 0 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The source of this DRGCLIP, the USGS DRG. USGS DRGs are examined to ensure color consistency within a series. Inspections are performed on selected DRGs to ensure that both the order of digital numbers and digital number values are correct. Colors will be checked for color compliance to map series and for major color differences between features on the DRG and similar features on the source map. Color consistency throughout each series is checked by comparing a DRG to its neighboring quadrangles whenever possible. Logical_Consistency_Report: The USGS DRG is produced with the intention of replicating as close as possible the original source map. Users will note, however, that a certain amount of "noise" can be discerned when small areas are blown up or viewed under zoomed-in conditions. This noise is in the form of random specks or pixels of color and halos due to any number of factors, such as, the quality of the source, the use of screens and patterns on the litho, and the unevenness of ink due to saturation and absorption. Discontinuities or breaks in linear features may also be present and are due to improper calibration or usage of the scanner, the condition of the source, and resampling. Descreening, quantizing, and noise filtering are methods used to reduce noise, which, besides creating a more aesthetically pleasing image, have the added benefit of reducing the size of the image file. Removal of lithographic screen patterns is preferred but not required. Completeness_Report: The USGS has checked for image completeness by visually inspecting a sampling of DRGs. Each was examined for gaps (missing data) in the main body of the map, the map collar, the overedge areas, and any insets. The map collar and all its contents have been removed from DRGCLIPs for Maine. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: USGS DRGs have been accuracy tested. The accuracy test was performed by comparing the positions of UTM grid intersections on the source graphic against the corresponding location on the digital image. A visual inspection will determine whether those coordinates fall within the pixels that define a grid tick. USGS DRGs duplicate the horizontal accuracy of the source maps. Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 12 Horizontal_Positional_Accuracy_Explanation: USGS DRGs retain the horizontal accuracy of the source maps. Most USGS printed maps contain the National Map Accuracy Standards (NMAS) note in the collar area. The NMAS states that for maps on publication scales of 1:20,000 or smaller, not more than 10 percent of the points tested shall be in error by more than 1/50 inch measured on the publication scale. Test points must be "well-defined", that is, easily visible or recoverable on the ground. For DRGs this accuracy statement applies only to that area of the DRG that falls within the neatline of the source map (excluding inset areas). Overedge areas falling outside the transformation boundary area (the map neatline), can exhibit anomalies or discrepancies. These anomalies also appear in the map inset areas and in the map collar. For maps without the NMAS note, the horizontal accuracy is unknown. The DRGCLIPs retain the accuracy of the source map. The map collar and all its contents have been removed from DRGCLIPs for Maine. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: National Geodetic Vertical Datum of 1929. USGS topographic maps utilize the vertical positional accuracy of the source. This accuracy is retained in USGS DRGs; however, the DRGCLIPs for Maine have been projected to NAD83 and vertical positional accuracy of elevation data may be affected by this conversion. The National Map Accuracy Standard applies to USGS topographic maps. At all map scales, the maximum allowable vertical tolerance is one half the published contour interval. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey (USGS) Publication_Date: 199804 Publication_Time: Unknown Title: (DRG) Digital Raster Graphics Edition: 1.0 Geospatial_Data_Presentation_Form: raster digital data Series_Information: Series_Name: USGS Digital Raster Graphics Issue_Identification: Digital Raster Graphics (DRGs) are scanned color images of USGS topographic maps Publication_Information: Publication_Place: Sioux Falls Publisher: U.S. Geological Survey Other_Citation_Details: Earth Science Information Centers (ESIC) offer nationwide information and sales service for USGS map products and earth science publications. Additional metadata on USGS DRGs for Maine can be found in .dbf and comma delimited text format at http://megis.maine.gov/catalog/ tables link. For additional information, contact any USGS Earth Science Information Center (ESIC), or call 1-800-USA-MAPS. Online_Linkage: http://edcwww.cr.usgs.gov SMMS_Citation_Linkages_Hyperlinked: false SMMS_Citation_Source_Scale: 24000 SMMS_Citation_Source_Media: CD-ROM SMMS_Citation_Source_Time_Period: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19480101 Beginning_Time: Unknown Ending_Date: 19951231 Ending_Time: Unknown SMMS_Citation_Source_Currentness: ground condition Source_Scale_Denominator: 24000 Type_of_Source_Media: CD-ROM Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19480101 Beginning_Time: Unknown Ending_Date: 19951231 Ending_Time: Unknown Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: drg Source_Contribution: The collar information was removed from USGS Digital Raster Graphic (DRGs) to create DRGCLIP images for Maine GIS. Process_Step: Process_Description: Originally clipped DRGs were created from standard USGS 1:24000 Digital Raster Graphics (DRGs) for use by the Maine Forest Service, as part of an Arcview application. USGS DRGs contain the white margin and legend areas found on paper USGS quadrangles. This is inconvenient for those operations needing to mosaic several adjacent quads, so the following procedure was established. The Maine Forest Service has statewide jurisdiction, the project area covered the entire state of Maine. MFS has nine ranger districts, and the finished clipped DRG products were grouped onto CDs corresponding to those districts. The work environment was established in the following steps. The base data was 1:24000 scale USGS DRG quads on CD, supplied by USGS EROS data center, dated April 1998. The DRGs were in a UTM NAD27 georeferenced TIFF format. The data was supplied on CDs conforming to 1:250000-scale tile structure. Each tile was identified by alphanumeric format, not by tile name. In order to conform to MEGIS tile structure, and for operator convenience, the finished products would need to have the appropriate quadrangle names. Each USGS-supplied CD had a text file containing the DRG identification code and the corresponding quad name. For each CD, this data was imported to a Microsoft Access file, edited, then exported to an Info file called Quad.dat. The purpose of this Info file was to select the appropriate TIFF file for each tile when processing, and to name the output file by its quadrangle names. DRGs were processed in batches corresponding to MFS districts. An Arc/Info coverage was created which represents the MFS ranger districts. The getdist.aml was used to establish a workspace for a given district. The AML then created a polygon coverage of the district boundaries by reselecting from the MFS district coverage. Source_Used_Citation_Abbreviation: drg Process_Date: 199910 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: (MEGIS) Maine Office of Geographic Information Systems Contact_Position: GIS Coordinator Contact_Address: Address_Type: mailing address Address: State House Station 145 City: Augusta State_or_Province: ME Postal_Code: 04333-0145 Country: USA Contact_Voice_Telephone: (207) 624-7700 Contact_Facsimile_Telephone: (207) 287-3842 SMMS_Contact_Email_Hyperlinked: false Hours_of_Service: Monday through Friday 0800 - 1700 EST Process_Step: Process_Description: In October 2000, The Maine Department of Environmental Protection used the following process to create clipped DRGs projected to NAD83 and these were used to replace and upgrade original DRGCLIPS at MEGIS. All processes were completed using ArcInfo and ArcInfo GRID. The DRG TIFF image was converted into an ArcInfo GRID using the "imagegrid" command. To remove the collars from the DRG, the DRG grid was then clipped to the extent of the quadrangle using the MEGIS 7.5 minute map series index, 24KINDEX. The collarless, DRG grids were then projected from NAD27 to NAD83 using the ArcInfo "project" command with the "grid" option. The DRG grids were buffered by 100 meters and edges of adjacent grids were merged to fill in the "null" values providing data to complete "tiles" , and finally grids were converted back to TIFF images using the ArcInfo "gridimage" command. Source_Used_Citation_Abbreviation: drg Process_Date: 200010 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: (MEGIS) Maine Office of Geographic Information Systems Contact_Position: GIS Coordinator Contact_Address: Address_Type: mailing address Address: State House Station 145 City: Augusta State_or_Province: ME Postal_Code: 04333-0145 Country: USA Contact_Voice_Telephone: (207) 624-7700 Contact_Facsimile_Telephone: (207) 287-3842 SMMS_Contact_Email_Hyperlinked: false Hours_of_Service: Monday through Friday 0800 - 1700 EST Cloud_Cover: 0 Spatial_Data_Organization_Information: Indirect_Spatial_Reference: 751 image mosaic of Maine Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 204495 Column_Count: 138708 SMMS_Captured: false Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator 1983 Universal_Transverse_Mercator: UTM_Zone_Number: 19 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -69 Latitude_of_Projection_Origin: 0 False_Easting: 500000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: Row and Column Coordinate_Representation: Abscissa_Resolution: 1 Ordinate_Resolution: 1 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: 298.257 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Each DRGCLIP is a raster image. Pixels contain a digital number from 0 through 12. referencing a color palette of RGB values from 0 through 255 in which the standard colors used in the DRG are defined. Entity_and_Attribute_Detail_Citation: USGS Digital Raster Graphic Standards Distribution_Information: SMMS_Distribution_Name: Standard TIFF Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: (MEGIS) Maine Office of Geographic Information Systems Contact_Position: GIS Coordinator Contact_Address: Address_Type: mailing address Address: State House Station 145 City: Augusta State_or_Province: ME Postal_Code: 04333-0145 Country: USA Contact_Voice_Telephone: (207) 624-7700 Contact_Facsimile_Telephone: (207) 287-3842 SMMS_Contact_Email_Hyperlinked: false Hours_of_Service: Monday through Friday 0800 - 1700 EST Distribution_Liability: Users must assume responsibility to determine the usability of this data for their purposes. Although these data have been processed successfully on a computer system at the Maine Office of Geographic Information Systems, no warranty expressed or implied is made by MEGIS regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. Neither the Maine Office of Geographic Information Systems, nor any of its contributors, is liable for misuse of the data, for damage, for transmission of viruses, or for computer contamination through the distribution of these data sets. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: GeoTIFF Format_Specification: Tagged Image File Format ASCII_File_Structure: Case_Sensitive: false Format_Information_Content: TIFF image format is in widespread use in the desktop publishing world. It serves as an interface to several scanners and graphic arts packages. TIFF supports black-and-white, grayscale, pseudo color, and true color images, all of which can be stored in a compressed or decompressed format. TIFF images may contain georeferencing information in header tags, or a .tfw file, defined by the GeoTIFF standard. ArcGIS currently supports GeoTIFF tags. File_Decompression_Technique: Data available from this website is in .zip compressed format. WinZip is a Windows based, PKZip-compatible compression utility. You will need a program like this to extract the data. A link to a trial copy WinZip software is available at http://megis.maine.gov/links/. Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://megis.maine.gov/catalog/ SMMS_Hyperlinked: -1 Access_Instructions: These data are available to Internet browsers for download from the Maine GIS Internet Data Catalog. Data available from this website is in .zip compressed format. WinZip is a Windows based, PKZip-compatible compression utility. You will need a program like this to extract the data. A link to a trial copy WinZip software is available at http://megis.maine.gov/software.asp. If you are not already a GIS user, free software for viewing these files is available from Environmental Systems Research Institute, Inc. (ESRI). See http://megis.maine.gov/links/ for a link to ArcExplorer 9.x . SMMS_Distribution_Type: 1 Digital_Transfer_Option: Online_Option: Access_Instructions: Where file size and Internet access permit, data requests can be made available via File Transfer Protocol (FTP). SMMS_Distribution_Type: 1 Fees: Data may be downloaded from Maine GIS Internet Data Catalog at no charge. Turnaround: Data is available for immediate download from the Maine GIS Internet Data Catalog. SMMS_Distribution_Type: 1 Standard_Order_Process: SMMS_Distribution_Type: 2 Available_Time_Period: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19991231 Beginning_Time: Unknown Ending_Date: Present Ending_Time: Unknown Distribution_Information: SMMS_Distribution_Name: Standard ArcSDE Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: (MEGIS) Maine Office of Geographic Information Systems Contact_Position: GIS Coordinator Contact_Address: Address_Type: mailing address Address: State House Station 145 City: Augusta State_or_Province: ME Postal_Code: 04333-0145 Country: USA Contact_Voice_Telephone: (207) 624-7700 Contact_Facsimile_Telephone: (207) 287-3842 SMMS_Contact_Email_Hyperlinked: false Hours_of_Service: Monday through Friday 0800 - 1700 EST Distribution_Liability: Users must assume responsibility to determine the usability of this data for their purposes. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCSDE Format_Version_Number: ArcSDE 9.x ASCII_File_Structure: Case_Sensitive: false Format_Information_Content: Oracle 9i Digital_Transfer_Option: Online_Option: Access_Instructions: Please contact the Maine Office of GIS (MEGIS) for access instructions. SMMS_Distribution_Type: 1 Fees: Access is available through Maine's wide area network; WAN users may contact the Maine Office of Information Technology, Maine Office of Geographic Information Systems (MEGIS) for a login. SMMS_Distribution_Type: 1 Metadata_Reference_Information: Metadata_Date: 20000701 Metadata_Review_Date: 20070925 Metadata_Future_Review_Date: Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Maine Office of Geographic Information Systems Contact_Position: GIS Coordinator Contact_Address: Address_Type: mailing address Address: State House Station 145 City: Augusta State_or_Province: ME Postal_Code: 04333-0145 Country: USA Contact_Voice_Telephone: 207 624-7700 Contact_Facsimile_Telephone: 207 287-4563 SMMS_Contact_Email_Hyperlinked: false Hours_of_Service: Monday through Friday 0800 - 1700 EST Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: None Metadata_Use_Constraints: None