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 --
