Land Surveying Monument Community Monitoring

I put this web page together to support the monitoring of local land surveying monuments by the land surveying community, including members of the Central Valley Chapter of the California Land Surveying Association. The basic idea behind the community monitoring and the web site is to provide a service similar to the service currently provided for NGS datasheets, but for local the following land surveying monuments:

• Local horizontal control points.
• Local vertical benchmarks.
• Centerline property corner monuments.
• PLSS corners.
• Chisled crosses in Downtown Stockton.
• NGS control points.

It will also allow for more frequent updating of NGS control monuments, with the option to submit pictures and information on how the NGS control monuments fit with other control monuments in the area.

Please read the Redefined Horizons Geospatial Data Use and Download Agreement before you access, download, or use any of the data on this web page or other pages of this web site.

Currently I will ask that local land surveyors submit information on monuments via e-mail. However, in the future I hope to automate this process with some web forms. (I need to learn a little more about web forms and server side scripting before I can do this.) In the meantime, I will take the data about monuments that I collect via e-mail, and I will do two (2) things with it:

1. I will make the data available on the web, accessible from this web page.
2. I will produce a simple ESRI shapefile from the data that can be used in a free GIS editor like OpenJUMP/BizzJUMP.

I have organized this web page into six (6) sections. As monitoring information is submitted to me I will provide links to the information under the appropriate section. I have also included information on local control surveys in the supplemental section on the right side of this web page.

Local Horizontal Control Points

San Joaquin County Horizontal Control Points

Data on horizontal control points in San Joaquin County will go here.

Local Vertical Benchmarks

San Joaquin County Vertical Benchmarks

Data on vertical benchmarks in San Joaquin County will go here.

City of Stockton Vertical Benchmarks

In the list below you will find information on vertical benchmarks in the City of Stockton. See the section on control surveys for information on the City of Stockton Benchmark Book.

• City of Stockton Benchmark 121
• City of Stockton Benchmark 123
• City of Stockton Benchmark 212
• City of Stockton Benchmark 267

Selected Local KSN Control Points

In the list below you will find information on selected KSN control points that appear on public improvement or civil engineering plans.

• KSN Control Point 2113-0010-516

Centerline Property Corner Monuments

San Joaquin County Centerline Monuments

Data on property corner monuments located on road right-of-way centerline or within road right-of-way will go here. These monuments need special monitoring and preservation efforts because they are often destroyed during road contruction projects, or other construction projects. The first step to preserving these very important monuments is knowing where they are located.

Public Land Survey System (PLSS) Monuments

San Joaquin County PLSS Monuments

Data on PLSS corner monuments in San Joaquin County will go here. You may also want to visit the web site on the Central Valley Chapter of the CLSA PLSS Maintenance and Inventory Program hosted at Redefined Horizons.

Stockton Chisled Crosses

Chisled crosses have been used in the past to mark the location of lot lines and subdivision block corners in Downtown Stockton and in surrounding areas. You can download an ESRI Shapefile with point locations for chisled crosses in Downtown Stockon that I have cataloged. (These chisled crosses haven't been surveyed. The locations are approcimate, and the shapefile only provides a general idea of where chisled crosses can be found in Downtown Stockton.) I also included a portion of the City of Stockton GIS Parcel and Street Centerline layers for the area in which I am conducting my search for chisled crosses. I hope to make incremental improvements to this data as I continue to search for and catalog chisled crosses. Please note that I am not confirming the character of a chisled cross as a property corner or property corner accessory at this time. I'm just locating the crosses. I can't tell you who put the cross on the sidewalk or what the original purpose of the cross was. Do your own research and investigation! I'm just trying to preserve the evidence of these crosses before they are destroyed due to sidewalk improvements or street improvements.

Below is a list of the attributes included with each chisled cross in the shapefile.

• name: Name of the chiseled cross. The first part of this name is the primary street on which the cross is found. The second part of the name is a 4 digit serial number. The serial number begins at 0000 for each primary street.
• dc: The date the chiseled cross was cataloged.
• type: The type of the chiseled cross. This is "Block Corner Cross" or "Lot Line Cross".
• setting: Indicates if the cross is set in old concrete that matches the age of other sidewalks in the area, or in new concrete that has been replaced as part of maintenance or street improvements.
• mapper: Name of the person cataloging the crosses.
• psn: This is the primary street name on which the chiseled cross is located. Typically the primary street is the east-west street on which the cross is found.
• csn:: This is the cross street name on which the chiseled cross is located. Typically the cross street is the north-south street on which the cross is found. Lot line chisled crosses will not have an entry for the cross street name attribute.
• cmts: Any comments the mapper wanted to include for the chiseled crossopensource .

You can view a screenshot of the Downtown Stockton Chisled Crosses GIS Layer in OpenJUMP.

You can download photos of the chiseled crosses using the links in the list below. The photos are kept in packages that correspond to east-west streets in Stockton. They photo names correspond to the cross name in the shapefile or on the PDF map sheets. The photos are high-resolution, so each package of photos may take a few minutes to download. The photos have been zipped, so you will need 7-Zip or a similar program to unpack them.

• West Acacia Street Chiseled Cross Photos - Package 01
• West Flora Street Chiseled Cross Photos - Package 01
• West Oak Street Chiseled Cross Photos - Package 01

You can download map sheets from my Stockton Chiseled Cross Map Book as they are completed using the list of links below. The sheets are PDF files, but I can make them available as DXF files upon request. Just contact me and let me know which sheets you want in DXF format.

• Stockton Chiseled Cross Map Book Sheet 1 (Map Sheet)
• Stockton Chiseled Cross Map Book Sheet 1A (Data Sheet)

Local NGS Control Monuments

See the list below for recovery notes, pictures, and other information from local surveyors on NGS control monuments in the California Central Valley. Please also remember to visit the NGS Datasheet Web Page for information on your monument.

• H 965
• Lodiport
• Lodiport Azimuth Mark
• Turner 2
• Valve
• Vineyard
• W 1413