The area is California. I'll post the entire text file -- hopefully, this
will help. All I need is a MapInfo projection file.
Thanks,
Dan
LIBRARY : COUNTY
LAYER NAME : PLS
COVERAGE NAME : PLSFILL
COVERAGE DESCRIPTION:
The 'PLSFILL' layer is a polygon coverage depicting the
township, range and sections contained in the Public Land
Survey System grid for the State of California. Townships
are roughly six miles square, and are numbered north and
south from an established baseline. Likewise, ranges are
numbered east and west from an established meridian.
California uses three baseline/meridians, these being
Humboldt, Mt. Diablo, and San Bernardino, abbreviated H, M,
and S.
Meridian, township, range, and section values are
combined in the redefined item MTRS to facilitate relates
from/to other tables.
PLSFILL differs from the standard PLSA layer in that
landgrants and other areas excluded from the section survey
process are filled in. The primary purpose of this is to
facilitate the georeferencing of phenomena that are
spatially referenced by meridian, township, range, and
section. Though these sections do not legally exist, field
personnel will interpolate to determine what the section
would be if there were legally a section there. This is
common with fire starts as reported by the California
Department of Forestry (CDF). In fact, all of the work to
fill in these excluded areas was completed by CDF to help
georeference fire starts so they could be analyzed with GIS
(Geographic Information Systems) technology.
VITAL STATISTICS:
Datum: NAD 27
Projection: Albers
Units: Meters
1st Std. Parallel: 34 00 00 (34.0 degrees N)
2nd Std. Parallel: 40 30 00 (40.5 degrees N)
Longitude of Origin: -120 00 00 (120.0 degrees W)
Latitude of Origin: 00 00 00 (0.0 degrees)
False Easting (X shift): 0
False Northing (Y shift): -4,000,000
Sources: US Geological Survey,
California Department of Forestry
Source Media: Magnetic tape (digital file); mylar maps
Source Projection: Geographic (latitude/longitude)
Source Units: Degrees minutes seconds
Source Scale: 1:100,000
Capture Method: Scanned/digitized
Conversion Software: ARC/INFO rev. 6.1
Data Structure: Vector
ARC/INFO Coverage Type: Polygon
ARC/INFO Precision: Double
ARC/INFO Tolerances: 2 meters
Number of Features: 157,295
Layer Size: 80 MB
Data Updated: December 1999
DATA DICTIONARY:
DATAFILE NAME: PLSFILL.PAT
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC
-------------------------------------------
1 AREA 8 18 F 5
9 PERIMETER 8 18 F 5
17 PLSFILL# 4 5 B -
21 PLSFILL-ID 4 5 B -
25 MERIDIAN 1 1 C -
26 TOWNSHIP 4 4 C -
30 TOWNDIR 1 1 C -
31 RANGE 4 4 C -
35 RANGEDIR 1 1 C -
36 SECTION 2 2 C -
38 X-COORD 8 18 F 5
46 Y-COORD 8 18 F 5
** REDEFINED ITEMS **
25 MTRS 13 13 C
AREA : The area of the polygon in square coverage units.
PERIMETER : The length of the polygon perimeter of the polygon
in coverage units.
PLSFILL# : The software-assigned unique integer identification
number.
PLSFILL-ID: A user-assigned identification number.
SECTION : Section number (less than or equal to 36)
MERIDIAN : Abbreviation of the name of the meridian
TOWNSHIP : Township number
TOWNDIR : Township direction (N=north, S=south)
RANGE : Range number
RANGEDIR : Range direction (E=east, W=west)
MTRS : Concatenation of Meridian, Township, Towndir,
Range, Rangedir, Section.
X-COORD : X coordinate of the section's polygon label; most likely
the geographic centroid of the section (in coverage units).
Y-COORD : Y coordinate of the section's polygon label; most likely
the geographic centroid of the section (in coverage units).
NOTE: Both Township and Range store what is typically a
one or two digit number as a 4 byte character. This
is to manage a few half-sections that exist in the
state. These numbers all have a decimal and a
single decimal of value 0 or 5, and are
right-justified in their character fields.
DATA QUALITY ASSESSMENT:
The following are subjective comments regarding this data.
The layer is as complete as the USGS 100K quad sheets. The
feature accuracy is good and attribute accuracy is very
good. It also has all pertinent section information. BE
AWARE THAT THIS LAYER CONTAINS SECTIONS THAT ARE NOT
LEGALLY RECOGNIZED!
DATA CONTACT:
Contact Name: Steve Flatt
Contact's Phone: 916-464-4584
DOCUMENTATION DATES: 12/16/1999, 2/24/2000
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