DEPARTMENT OF FISH AND GAME GIS METADATA STATEWIDE COMBINED USGS MAP AND SPOTVIEW INDEX COVERAGE NAME: calquad COVERAGE PATH: dfghost /tsb/dfgbase/gislib METADATA FILE: calquad.txt METADATA DATE: March 3, 1999 METADATA PATH: dfghost /tsb/dfgbase/metadata/dfggis UPDATES: March 1999: Assembled index of scanned quad images, quad dates, SPOTView satellite imagery for comprehensive revision of coverage formerly known as "quad24k". Revised metadata file "quad24k.txt". Update sources: http://pubs.usgs.gov/publications/1998-12 (as of Dec 1998) http://mapping.usgs.gov/mac/maplists.html (as of March 1999) COVERAGE DESCRIPTION: Calquad is an ARC/INFO coverage which indexes three separate U.S. Geological Survey (USGS) map series and the Department of Fish and Game's statewide inventory of SPOTView satellite images. Calquad also provides essential information on the dates of currency of one of the map series as well as other map attributes such as USGS quad name, stock number and other reference codes, hardcopy format (size), and scanned image file size. The index map itself consists of a vector representation of the boundaries of the USGS 7.5'-series, 1:24,000-scale quadrangles (quads), with extensions into neighboring states, totalling slightly more than 3000 polygons. Each quad polygon has a corresponding record in the table calquad.pat which contains 7.5' quad attributes and the names and identifiers of larger, enclosing maps: the USGS 30x60'-series, 1:100,000-scale quads (100K) and the USGS 1x2-degree-series, 1:250,000-scale quads (250K). Calquad.pat also contains the name of the SPOTView satellite image covering a particular 7.5' quad, as well as the CD-ROM disk number and file name of the Digital Raster Graphic (DRG) scanned image of the 7.5' quad. The majority of the index boundaries were automatically generated with the ARC/INFO 'GENERATE' command with the 'GRID' option. The automatic grid was edited to precisely correspond to boundaries of published, USGS hardcopy maps in areas of non-standard quads along the coast, Channel Islands, and along neighboring state borders. The intended uses of Calquad include: search for the proper DRG and/or SPOTView images for ARC/INFO and ArcView applications, updating quad information, map digitizing, generating custom quad indexes and quad purchase lists, automating project metadata, etc. Details on DFG SPOTView and Teale DRG are available in metadata text files dfggis/spotview.txt and teale/trimdrg.txt, respectively. Acknowledgements: State of California, Stephen P. Teale Data Center, GIS Solutions Group (Teale): statewide DRG production and preliminary index; Governor's Office of Emergency Services (OES): compilation of DRG quad dates and other attributes; California Department of Fish and Game, Information Technology Branch: non-standard quad boundaries, quad currentness year information and enhanced index compilation. VITAL STATISTICS: Datum: NAD 27 Projection: Albers Units: Meters 1st Std. Parallel: 34 00 00 2nd Std. Parallel: 40 30 00 Longitude of Origin: -120 00 00 Latitude of Origin: 00 00 00 False Easting (X shift): 0.0 False Northing (Y shift): -4,000,000 Sources: ARC/INFO GENERATE GRID; Geographic Names Information System (GNIS) Source Media: On-line Source Projection: Geographic (latitude/longitude) Source Units: Decimal Degrees Source Scale: n/a Capture Method: n/a Conversion Software: ARC/INFO rev. 7.0.3; ARCVIEW 3.1 Data Structure: Vector ARC/INFO Coverage Type: Polygon ARC/INFO Precision: Double ARC/INFO Tolerances: Fuzzy = 1207.343 V; Dangle = 0.000 V Number of Features: 3059 Layer Size: Appx. 7 megabytes (.E00 export) Data Updated: March 1999; plus continuous revision DATA DICTIONARY: Structure of table calquad.pat '----tracy 2/4/02--- note: these are the original fields found in Calquad. many have been moved to accessory database tables. only the ones preceeded with a * remain i am thinking of... 1. drop quadcode if not in real use (leave it in dfg_info) 2. drop scanname if not in real use (leave it in usgs-drg_info) 3. drop scancode cause its dumb cause you have the same info in ocode and scancd 4. create an accessory table with map name options (caps, lower case, abreviated, stacked) ITEM NAME WIDTH OUTPUT TYPE N.DEC DESCRIPTION *CALQUAD-ID 4 5 B - User-assignable identifier *QUADNAME 27 27 C - USGS 7.5' quad name *x_coord for a calculated centroid *y_coord for a calculated centroid *MAPNAME 31 31 C - Teale name for USGS 7.5' quad *SCANNAME 30 30 C - Teale name for DRG scan file *OCODE 8 8 C - Teale code for DRG quad image file *SCANCD 3 3 C - CD-ROM disk number of 7.5' DRG *SCANCODE 8 8 C - File name of 7.5' DRG quad image *QUADCODE 7 7 C - DFG code equivalent to USGSCODE *USGSCODE 7 7 C - USGS code for degree block of quad *CNPSCODE 4 4 C - CA Native Plant Society quad code AREA 8 18 F 5 Area of polygon, square meters PERIMETER 8 18 F 5 Polygon perimeter, meters SPOTVIEW 8 8 C - File name of SPOTView image SPOTCD 3 3 C - CD-ROM disk number of SPOTView TRIMMB 4 5 F 2 Trimmed DRG file size, megabytes UNTRIMMB 4 5 F 2 Standard (untrimmed) DRG file size YRSCAN 4 4 C - Latest year shown on DRG quad image YRCURRENT 4 4 C - Currentness year of USGS 7.5' quad YRLATEST 4 4 C - Latest year shown on DRG scan YRORIGMAP 4 4 C - Year of original USGS mapping YRREVISION 4 4 C - Year of revision YRAIRPHOTO 4 4 C - Year of aerial photography YRFIELDCK 4 4 C - Year quad was field-checked YRPHTOTOPO 4 4 C - Year of revision aerial photography YRREVSOURC 4 4 C - Year of revision source data YRPHTOINSP 4 4 C - Year of photo-inspection YRUSGSCUR 4 4 C - Year of currentness (USGS database) YRUSGSCUR1 1 1 C - Flags YRUSGSCUR as photo-insp. only SOUTH 8 10 F 5 Southern limit of 7.5' quad (DD) NORTH 8 10 F 5 Northern limit of 7.5' quad (DD) EAST 8 10 F 5 Eastern limit of 7.5' quad (DD) WEST 8 10 F 5 Western limit of 7.5' quad (DD) SE_COR_LON 9 9 C - Longitude of southeast corner (DMS) SE_COR_LAT 9 9 C - Latitude of southeast corner (DMS) CONTOURINT 10 10 C - Contour interval (main) CONINTRMIT 10 10 C - Contour interval (intermittent) VERT_DATUM 15 15 C - Vertical datum (for elevations) KSCALE 2 2 C - Original map scale (1:24,000/25) FORMAT 12 12 C - Hardcopy map format (geographic) QUADSIZE 1 1 C - Flags non-standard quad sizes etc. PROJECTION 80 80 C - Original USGS 7.5' quad projection NOTES 175 175 C - Processing or other detail notes MAPNAME25 20 20 C - USGS name for 1:25,000 scale quad Q100CODE 3 3 C - Teale code for 100K quad Q100NAME 21 21 C - USGS name for 100K quad Q250CODE 2 2 C - Teale code for 250K quad Q250NAME 21 21 C - USGS name for 250K quad STATE1 2 2 C - One of two states a quad is in STATE2 2 2 C - Other of two states a quad is in BORDER 2 2 C - Flags quads bordering California R1 1 1 C - Yes or No quad is in DFG Region 1 R2 1 1 C - Yes or No quad is in DFG Region 2 R3 1 1 C - Yes or No quad is in DFG Region 3 R4 1 1 C - Yes or No quad is in DFG Region 4 R5 1 1 C - Yes or No quad is in DFG Region 5 R6 1 1 C - Yes or No quad is in DFG Region 6 R7 1 1 C - Yes or No quad is in DFG Region 7 STOCKNO 8 8 C - USGS Stock Number for 7.5' quad REF_CODE 25 25 C - USGS reference code for 7.5' quad CCC_CODE 3 3 C - CA Coastal Commission quad code UTM_ZONE 2 2 C - UTM Zone (10 or 11) of 7.5' quad UTM_MGRS 4 4 C - UTM w/Military Grid Reference Sys. CCSZONE27 1 1 C - Stateplane zone, NAD 27 CCSCODE27 4 4 C - Stateplane zone code, NAD 27 CCSMIX 4 4 C - Flags quads in multiple CCS zones CCSZONE83 1 1 C - Stateplane zone, NAD 83 CCSCODE83 4 4 C - Stateplane zone code, NAD 83 BASEMERID 1 1 C - Public Land Survey Base/Meridian METACODE 8 8 C - Update tracking code METADATE 8 8 C - Date of Calquad update USERCODE 8 8 C - User-defineable code -------- DETAILED ITEM DESCRIPTIONS: ----- AREA 8 18 F 5 Area of polygon, square meters PERIMETER 8 18 F 5 Polygon perimeter, meters CALQUAD# 4 5 B - ARC/INFO internal record number CALQUAD-ID 4 5 B - User-assignable identifier These are default ARC/INFO fields (items). Users are cautioned not to rely on uniqueness of CALQUAD-ID. ----- QUADNAME 27 27 C - USGS 7.5' quad name This is the name of the USGS 7.5'-series, 1:24,000-scale topographic quad, spelled exactly as it appears on the hardcopy, published map, including punctuation in abbreviated names (e.g. SHINN MTN.) ----- YRSCAN 4 4 C - Latest year shown on DRG scan State of California Governor's Office of Emergency Services (OES) inventoried date information from the actual DRG image files. YRSCAN is a duplicate of item YRLATEST below, positioned here for convenience in viewing together with QUADNAME. ----- SCANCD 3 3 C - CD-ROM disk number of 7.5' DRG SCANCODE 8 8 C - File name of 7.5' DRG These items tell where to find the DRG scan file of a particular USGS 7.5' quad, both Trimmed and Standard (untrimmed) versions. SCANCODE is the same as item OCODE for all quads that Teale has scanned in the statewide DRG project. There are 79 total SCANCDs in the set. Calquad has some quads that are not yet scanned-----these have a "No Scan" entry for SCANCODE. The SCANCODE identifies each Teale DRG quad image file. The complete file set for a DRG quad image has an "o" prefix, a .tif suffix, and an additional "world file" with suffix .tfw. Example: SPRINGVILLE: SCANCD 53: o36118b7.tif, o36118b7.tfw. Both the .tif and .tfw files must be in the same directory for proper display of the DRG quad image in ArcView or ARC/INFO. SCANCODE is based on the USGS code for a one-degree block of latitude/longitude with a suffixed alphanumeric specifying the quad position within the 8 x 8 quad block. Example: SPRINGVILLE o36118b7 The one-degree block's southeast corner is 36 North latitude, 118 W longitude. The a,b,c to h codes identify rows of 7.5' quads, increasing northward from the southeast corner of the block. The 1,2,3 to 8 codes identify the columns of quads, increasing westward from the southeast corner of the block. ----- SPOTVIEW 8 8 C - File name of SPOTView image SPOTCD 3 3 C - CD-ROM disk number of SPOTView These items tell where to find the SPOTView satellite image file that covers a particular USGS 7.5' quad. Details on SPOTView are in the metadata text file "spotview.txt". A single SPOTView is typically 4 x 4 quads in size. The SPOTView image name is taken from the full or partial name of the northwestern-most 7.5' QUADNAME in the 4 x 4 block. ----- TRIMMB 4 5 F 2 Trimmed DRG file size UNTRIMMB 4 5 F 2 Standard (untrimmed) DRG file size File sizes are given in megabytes for both DRG versions. Users may wish to use the ArcView/Table/Field/Statistics function to estimate storage requirements for a selected set of DRG image files. ----- YRCURRENT 4 4 C - Currentness year of USGS 7.5' quad This date is the most recent reported from the following sources, in priority order: 1.) http://pubs.usgs.gov/publications/1998-12 (as of Dec 1998) 2.) http://mapping.usgs.gov/mac/maplists.html (as of March 1999) 3.) YRLATEST item from OES DRG compilation (latest year on actual scan) 4.) http://edcwww.cr.usgs.gov/Webglis/glisbin/search.pl?/MAPS_LARGE 5.) USGS hardcopy map catalog (February 1994) ----- YRLATEST 4 4 C - Latest year shown on DRG scan This year is the latest year compiled from viewing the actual scanned DRG image. This item does not include the USGS print date, effectively the latest possible date a hardcopy map publication can have. This item duplicates YRSCAN above and is placed here for convenience of viewing together with other quad dates. ----- YRLATEST 4 4 C - Latest year shown on DRG scan YRORIGMAP 4 4 C - Year of original USGS mapping YRREVISION 4 4 C - Year of revision YRAIRPHOTO 4 4 C - Year of aerial photography YRFIELDCK 4 4 C - Year quad was field-checked YRPHTOTOPO 4 4 C - Year of revision aerial photography YRREVSOURC 4 4 C - Year of revision source data YRPHTOINSP 4 4 C - Year of photo-inspection This collection of year items is one of several kinds of information compiled by the State of California Governor's Office of Emergency Services (OES) from the viewing of actual DRG scanned images of USGS 7.5' quads. ----- YRUSGSCUR 4 4 C - Year of currentness (USGS database) YRUSGSCUR1 1 1 C - Flags YRUSGSCUR as photo-insp. only YRUSGSCUR was compiled by the California Department of Fish and Game Information Technology Branch from an online USGS database at URL: http://mapping.usgs.gov/mac/maplists.html (as of March 1999) YRUSGSCUR1 flags those years in YRUSGSCUR that are photo inspection dates for a given quad. Photo inspection is not a sufficient condition for USGS to reprint a map, and is therefore not necessarily the date of the most currently available hardcopy of a particular quad. There are known discrepencies between the year values in YRUSGSCUR and the dates of actually available hardcopy maps. A comprehensive revision of these quad currentness information is in progress (March 1999) by USGS and will be the source for revision of Calquad. ----- SOUTH 8 10 F 5 Southern limit of 7.5' quad (DD) NORTH 8 10 F 5 Northern limit of 7.5' quad (DD) EAST 8 10 F 5 Eastern limit of 7.5' quad (DD) WEST 8 10 F 5 Western limit of 7.5' quad (DD) These items give decimal degree coordinates for the bounding box around a given 7.5' quad. The domain of values for the minutes/seconds of a degree in regular 7.5' quads is: 00'00" ----- .00000 07'30" ----- .12500 15'00" ----- .25000 22'30" ----- .37500 30'00" ----- .50000 37'30" ----- .62500 45'00" ----- .75000 52'30" ----- .87500 DFG/ITB derived actual decimal degree limits for the DRG scans of those quads that have irreglar boundaries (Channel Islands and certain quads along the California coast). By ARC/INFO convention, west longitudes are negative. ----- SE_COR_LON 9 9 C - Longitude of southeast corner (DMS) SE_COR_LAT 9 9 C - Latitude of southeast corner (DMS) Southeast corner coordinates are given for each 7.5' quad in units of degrees, minutes, and seconds of north latitude and west longitude (unsigned). This is exact only for regular 7.5' quad boundaries. For irregular quads, these are nominal values only (see SOUTH, NORTH, etc above). ----- CONTOURINT 10 10 C - Contour interval (main) CONINTRMIT 10 10 C - Contour interval (intermittent) Compiled by OES. Units of feet or meters are given in the actual field entries. ----- VERT_DATUM 15 15 C - Vertical datum (for elevations) The vertical datum on a quad specifies the zero point for elevation data. Compiled by OES. VERT_DATUM has either "NGVD 29" or "Mean Sea Level" entries. In 1971, USGS made official the designation "National Geodetic Vertical Datum of 1929" for all quads mapped on the North American Datum (horizontal) of 1927 (NAD27). NGVD 29, a sea-level datum, is now superceded by NGVD 88 for use with NAD 83. Differences between NGVD 29 and NGVD 88 in California are on the order of a meter or so. ----- KSCALE 2 2 C - Original map scale (1:24,000/25) Scale of the quad as two digits from the representative fraction: 24 = 1:24,000; 25 = 1:25,000. Most 7.5' quads are at the 1:24,000 scale. Exceptions are the 1:25,000-scale "double" quads (See QUADSIZE = D). ----- FORMAT 12 12 C - Hardcopy map format (geographic) Format of the quad in geographic minutes. "Regular" quads are designated with format = 7.5x7.5'; Irregular quads occur in the Channel Islands and along the California coast, and in the 1:25,000, 7.5x15' "double quad" set. ----- QUADSIZE 1 1 C - Flags non-standard quad sizes etc. This item is a single character that flags the condition of a quad's standard (regular) or irregular dimensions: Value Description S 'Standard'; regular 7.5x7.5' format W 'Wide' format; oversized in the X-axis T 'Tall' format; oversized in the Y-axis O 'Oversized' in both X and Y axes D 'Double' quad; part of 1:25,000-scale set ----- PROJECTION 80 80 C - Original USGS 7.5' quad projection Compiled by OES. Projection as shown on the original hardcopy quad scanned by Teale into the DRG image. Examples: Universal Transverse Mercator, Zone 10; California Coordinate System, Zone 1 (aka State Plane) ----- NOTES 175 175 C - Processing or other detail notes Compiled by OES/Teale. Explanatory notes about the original hardcopy map, the DRG, etc. ----- MAPNAME 31 31 C - Teale map name for USGS 7.5' quad SCANNAME 30 30 C - Teale map name as used with DRG MAPNAME25 20 20 C - USGS name for 1:25,000 scale quad Alternative names for a given USGS 7.5' quad. Names are problematic as keys in digital databases due to varying methods of spelling, abbreviations, inclusion or exclusion of punctuation marks, etc. Users may wish to reference OCODE or STOCKNO to uniquely identify a quad or DRG file. ----- Q100CODE 3 3 C - Teale code for 100K quad Q100NAME 21 21 C - USGS name for 100K quad These items identify the USGS 30x60', 1:100,000-scale (100K) quad that overlaps a given 7.5' quad. The Teale code is unofficial, and references the 100K quad as a quadrant within the larger 250K quad: 1 - NW; 2 - NE; 3 - SW; and 4 - SE. Example: XJ2, EAGLE LAKE, is the northeast 100K quad within the SUSANVILLE (XJ) 250K quad. The official USGS reference code for 100K quads identifies the southeast corner of the quad within a one-degree block and includes scale and map type. Example: EAGLE LAKE: 40120-E1-TM-100. See USGS map catalogs. ----- Q250CODE 2 2 C - Teale code for 250K quad Q250NAME 21 21 C - USGS name for 250K quad These items identify the USGS 1x2-degree, 1:250,000-scale (250K) quad that overlaps a given 7.5' quad. The Teale code is unofficial, and references each of the forty-three 250K quads in California and vicinity. The official USGS reference code for 250K quads identifies the southeast corner of the quad in a one-degree block. Example: SUSANVILLE: 40120-A1-TF-250-00. See USGS map catalogs. ----- STATE1 2 2 C - One of two states a quad is in STATE2 2 2 C - Other of two states a quad is in These items identify quads that are very near state borders or those that actually overlap state or international borders. No dominant proportion of a state within the quad is intended with the "1" and "2" designations. A combination of these items and BORDER below may be needed to identify quads which overlap more than two states. ----- BORDER 2 2 C - Flags quads bordering California Quads in the vicinity of neighboring states are flagged in the BORDER item, as well as quads covering California offshore islands: Value Description AZ Quad contains the Arizona state border or is wholly within Arizona IS Quad covers all or part of an offshore island MX Quad contains the Mexico border NO Quad does not contain a state border and is not part of an island NV Quad contains the Nevada border or is wholly within Nevada OR Quad contains the Oregon border or is wholly within Oregon ----- R1..R7 1 1 C - Yes or No quad is in DFG Region 1 - 7 Logical fields for easy selection of quad sets covering California Department of Fish and Game (DFG) Regions. The entries are designed to overcome the limitations of a simple ArcView/Select-by-Theme function, whereby some quads very near (but not intersecting) a region boundary may be needed but omitted from the automatic selection. ----- OCODE 8 8 C - Teale code for DRG quad image file The OCODE uniquely identifies each 7.5' quad in Calquad. OCODE is based on the USGSCODE for a one-degree block of latitude/longitude with a suffixed alphanumeric specifying the quad position within the 8 x 8 quad block. Teale prefixes an "o" to all OCODES. Example: SPRINGVILLE o36118b7 The one-degree block's southeast corner is 36 North latitude, 118 W longitude. The a,b,c to h codes identify rows of 7.5' quads, increasing northward from the southeast corner of the block. The 1,2,3 to 8 codes identify the columns of quads, increasing westward from the southeast corner of the block. OCODE is identical to SCANCODE for all quads Teale has scanned in the statewide DRG set. NOTE: Irregular quads may have boundaries that extend beyond a normal 7.5' x 7.5' cell. In such cases the alphanumeric cell that contains the southeast corner of the quad is used to create the OCODE and SCANCODE. Example: SHUBRICK PEAK o40124b2, not a2; LONG BEACH o33118f2, not g2 ----- STOCKNO 8 8 C - USGS Stock Number for 7.5' quad Use this code to order hardcopy maps directly from USGS. Government agencies enjoy a 25% discount for orders of 100 or more, from the normal $4 per 7.5' quad. ----- REF_CODE 25 25 C - USGS reference code for 7.5' quad Compiled by OES from viewing DRG quad images of actual hardcopy maps. The REF_CODE string concatenates the USGSCODE, a quad type code, and the quad scale. Example: SPRINGVILLE 36118-B7-TF-024, decodes as one-degree block 36N/118W, quad B7 (see OCODE above), Topographic, Feet (elevation units), and 1:24,000-scale. Other formats for REF_CODE also exist: Example: SAN LUIS OBISPO N3500-W12030/7.5x8.5, decodes as follows: the southeast corner of the quad is 35 degrees, 00 minutes north latitude, 120 degrees, 30 minutes west longitude. The format is (non-standard) 7.5 minutes of latitude by 8.5 minutes of longitude (See also QUADSIZE = W). ----- USGSCODE 7 7 C - USGS code for degree block of quad QUADCODE 7 7 C - DFG code equivalent to USGSCODE These two codes are equivalent, except that QUADCODE is a legacy from DFG's California Natural Diversity Data Base (CNDDB). QUADCODE substitutes numbers for the letters in USGSCODE. See the OCODE description above for decoding. ----- CNPSCODE 4 4 C - CA Native Plant Society quad code The CNPSCODE is also a legacy from the CNDDB above, and may still be in use by other agencies such as the California Department of Water Resources (DWR) and the USDA Forest Service. Example: CRESTVIEW 452C, decodes with the numeric part referencing a 15' block of 4 x 4 quads (corresponding to the now obsolete USGS 15'-series, 1:62,500-scale quads), the alpha part refers to the corners of the block: A - NE, B - NW, C - SW, and D - SE. ----- CCC_CODE 3 3 C - CA Coastal Commission quad code The California Coastal Commission is responsible for the administration of zoning regulations within the California Coastal Zone (CZ). The CCC has numbered each of the quads near or containing the CZ from 1 to 181. ----- UTM_ZONE 2 2 C - UTM Zone (10 or 11) of 7.5' quad UTM_MGRS 4 4 C - UTM w/Military Grid Reference Sys. These codes identify the location of each 7.5' quad within the Universal Transverse Mercator (UTM) zone. UTM Zone 11 is east of 120 W longitude, and UTM Zone 10 is west of 120 W longitude. UTM_MGRS refers to the Military Grid Reference System, which specifies an 8-degree latitude zone within a UTM Zone. In California, UTM_MGRS = 10 S specifies UTM Zone 10, 32 to 40 degrees N; 10 T specifies 40 to 48 degrees N latitude. The same structure applies to UTM Zone 11. UTM_MGRS is typically displayed on GPS receivers, where the "S" should not be confused as indicating "South". ----- CCSZONE27 1 1 C - Stateplane zone, NAD 27 CCSCODE27 4 4 C - Stateplane zone code, NAD 27 CCSMIX 4 4 C - Flags quads in multiple CCS zones CCSZONE83 1 1 C - Stateplane zone, NAD 83 CCSCODE83 4 4 C - Stateplane zone code, NAD 83 The California Coordinate System (CCS, also known as State Plane) divides the entire state into 7 zones under NAD 27 (Los Angeles County alone is in CCSZONE27 = 7). There are 6 zones under NAD 83 (Los Angeles is now part of CCSZONE83 = 5). Each 7.5' quad in Calquad is coded for the CCS zone that overlaps the majority of its area. CCSMIX contains compound entries to indicate multiple CCS zones overlapping a particular quad. CCSCODE27 and CCSCODE83 refer to the Federal Information Processing System (FIPS) codes for the CCS zones. These codes are used as arguments in the ARC/INFO PROJECT command, to convert coverages to/from State Plane coordinates. ----- BASEMERID 1 1 C - Public Land Survey Base/Meridian There are 3 Public Land Survey baseline and meridian sets in California: H = Humboldt; M = Mount Diablo; and S = San Bernardino. Each 7.5' quad in Calquad is coded for the set that overlaps the majority of its area. ----- METACODE 8 8 C - Update tracking code METADATE 8 8 C - Date of Calquad update USERCODE 8 8 C - User-defineable code These codes are for update tracking for individual 7.5' quads. Where METACODE = 1, DFG has verified the currentness year from online USGS sources (see item YRCURRENT above); METACODE = 0 indicates that the currentness year is unvalidated, or is based on the USGS Map Catalog for California dated February 1994. METADATE is the date of the update to a given record of Calquad. USERCODE may be modified by users for any particular purpose. There are temporary values in USERCODE, decoded as follows: Value Description usgs YRCURRENT is derived from USGS sources (see YRCURRENT description) teale YRCURRENT is derived from OES compilation from Teale DRG quad images even YRCURRENT is equivalent from usgs or teale sources overlap Polygon is an artifact of overlap among certain Channel Island quads ----- SPECIAL NOTES: USGS 1:25,000-Scale (25K) Topographic Maps There are 10 quads in California (vicinity of Trinity, Shasta, and Tehama Counties) and one along the Nevada border that have a 7.5x15' format (aka 'double quads'). Teale's DRG processing of these quads involved a complete scan of the double quad for the Standard (untrimmed) DRG version, and a clipping to the 1:24,000-scale (regular) quad boundary for the Trimmed DRG version. The trimmed versions are thus presented as two DRG files per 25K quad (except for Dogskin Mtn, NV): OCODE MAPNAME (Teale Trimmed DRG) MAPNAME25 (Teale Standard DRG) o39119h8 SEVEN LAKES MOUNTAIN DOGSKIN MTN (NV) (west half only as trimmed) (full quad as untrimmed) o40122a7 SOUTH YOLLA BOLLY MOUNTAINS SOUTH YOLLA BOLLY o40122a8 SOLOMON PEAK SOUTH YOLLA BOLLY o40122b7 TOMHEAD MOUNTAIN NORTH YOLLA BOLLY o40122b8 NORTH YOLLA BOLLY NORTH YOLLA BOLLY o40122c5 CHICKABALLY MTN EAST CHICKABALLY MTN o40122c6 CHICKABALLY MTN WEST CHICKABALLY MTN o40122c7 BEEGUM BEEGUM o40122c8 PLATINA BEEGUM o40122d5 ONO EAST ONO o40122d6 ONO WEST ONO o40122d7 ARBUCKLE MOUNTAIN CHANCHELULLA PEAK o40122d8 CHANCHELULLA PEAK CHANCHELULLA PEAK o40123a1 WRIGHTS RIDGE FOUR CORNERS ROCK o40123a2 FOUR CORNERS ROCK FOUR CORNERS ROCK o40123b1 BLACK ROCK MOUNTAIN BLACK ROCK MTN o40123b2 SWIM RIDGE BLACK ROCK MTN o40123c1 PONY BUCK PEAK PONY BUCK PEAK o40123c2 SMOKY CREEK PONY BUCK PEAK o40123d1 WILDWOOD DUBAKELLA MTN o40123d2 DUBAKELLA MOUNTAIN DUBAKELLA MTN ----- DATA QUALITY ASSESSMENT: The following are subjective remarks on the quality of Calquad data. Automatically generated quad boundaries were derived from latitude and longitude values in decimal degrees and projected with ARC/INFO into the Albers Conic Equal-Area coordinates. Precision limits are those of the software. Attribute completeness is good for all quads. Quad currentness year is subject to periodic updates. Some quads outside California have incomplete records. Coverage entries for quad names containing abbreviations such as MTN for mountain, MT for mount, etc, may be mismatched with names as they appear on actual published quad sheets. Discrepencies may also exist among coverage entries and published, USGS map catalogs and hardcopy indexes. DATA CONTACTS: USGS quads: Department of Interior U.S. Geological Survey National Mapping Division http://mapping.usgs.gov 1-800-275-8747 Digital Raster Graphics (California statewide set of scanned 7.5' quads): State of California Stephen P. Teale Data Center GIS Solutions Group http://gislab.teale.ca.gov Roger Ewers, rewers@gislab.teale.ca.gov (916) 263-1488 DATA DISTRIBUTION for DFG: Information Technology Branch Spatial Data Coordination Paul Veisze, pveisze@dfg.ca.gov Will Patterson, wpatters@dfg.ca.gov (916) 323-1484 METADATA CONTACT: Paul Veisze, DFG Spatial Data Coordinator (916) 323-1667; Email: pveisze@dfg.ca.gov -- end of file calquad.txt, 1999-03-03 --