California Automated Land Records
Frequently Asked Questions
automated records can I find on this site? You can find Master
Title Plats (MTPs), Oil and Gas Plats, Leasable Resources Plat, and
Historical Index (HI) pages including index pages to acquired lands
and Mineral Locations and Contests. These are the documents that used
to be microfilmed and then made available for review in our Information
Access Centers throughout the state.
Where can I find
Cadastral Survey plats and Field Notes? Cadastral Survey plats,
Mineral Surveys or Field Notes are not yet available online and can
be obtained from the California State Office Information Access Center,
What type of image
are these files? All the images have been scanned and archived
as a Tagged Image File Format (tiff or tif). The tif format has been
determined to be a high quality image format and was selected by the
National Archive as the most widely accepted and preferred image format
for scanning and archiving.
What information do I need to find
the image I'm looking for? Over 30,000 MTP and HI pages have
been scanned and are searchable by meridian, township, and range (MTR).
Once you select the MTR, you will be presented with a table displaying
the names of all the images scanned in that selected MTR. If you are
uncertain what MTR you need, you may contact the California State
Office at (916) 978-4400 for assistance.
What do all the
characters mean in the image name? The file name consists of
15 characters. For example, in the file name ca210090n0150e0-1001.tif,
the first two characters "ca" indicate the two-letter state
abbreviation, i.e., ca = California. The third and fourth characters
"21" are the two-digit Meridian Code. Humboldt Meridian
= 15, Mount Diablo Meridian = 21, San Bernardino Meridian = 27, and
Gila Salt River Meridian = 14. The fifth, sixth and seventh characters
"009" are the three-digit Township number, with leading
zeros for townships of single digits. The eighth character "0"
is for fractional townships. A "0" represents no fraction,
"2" represents a ½ Township. The ninth character
"n" is the township direction, n= North, and s= South. The
tenth, eleventh and twelfth characters "015" are the three-digit
range number, with leading zeros for ranges of single digits. The
thirteenth character "0" is for fractional ranges. A "0"
represents no fraction and a "2" represents a ½ Range.
The fourteenth character "E" is the range direction, E =
East and W = West. The fifteenth character "0" is duplicate
townships, "0" is for no duplicate and "2" indicates
the second of two duplicate township. The four characters after the
dash are the Plat Type Code and Page Number.
What are Plat Type
Codes? The Plat Type Code is the last
4 digits of an image name. For example, using the same image name
as above, ca210090n0150e0-1001.tif,
last four digits are 1001.
The Plat Type Code can be identified easily because it is separated
from the rest of the image name by a hyphen ("-"). The 4-digit
code is broken down into two parts: the first two digits are the plat
type, the second 2 digits are the page number for that plat type.
For example the code 1001 is the first page of the MTP. The 10 represents
the Plat Type Code for MTP and the 01 represents the page number.
A Plat Type Code of 1002 could be a supplemental plat, a continuation
remarks sheet, or some other type of supplemental sheet for the original
MTP, but indicates that it is page 2. This numbering system holds
true for all plat types. Page 10 of an HI would be numbered 2010.
The following is a chart of plat type codes and what type of plat
or document they represent:
Plat Type Code
Master Title Plat (MTP)
Historical Index (HI)
Acquired Land Historical Index
Mineral Location/Contests Historical Index
Oil & Gas Plat
Leasable Minerals Plat
- What software is used to view the images online?
This site utilizes the Acordex
Java Image Viewer to view tiff images of MTPs, HIs, and other use
Upon selection of a particular image file, the viewer
will open in a new browser window. Within the viewer, you can ZOOM,
PAN, SAVE and PRINT copies of the plats for future use. A guide how
to use the Acordex Java Image Viewer can be found by clicking here.