Description: These data are known and presumed locations of survey benchmarks in our area of interest. The benchmarks are coded so the user can know whether one has been recovered and GPSd or not. The typical process is that a suspected location is found in an old survey record or on an old plat and then estimated. That location is then loaded into a GPS unit and verified in the field. Typically the markers is within 50 feet of the suspected location, so with a minor amount of searching the markers are found. Once the marker is found it is GPS'd with a survey-grade receiver and the marker location in GIS is moved to the correct spot and attributes updated. In other cases, markers may be found by sheer luck while searching for other markers, and then GPS'd and added to the database.
Description: This is the definitive county boundary, based on published plats, survey data, and GPS'd boundary markers. As opposed to other Los Alamos County boundary layers, such as in Google Maps, Esri map services, Bing, or those published by TIGER or the New Mexico GIS clearinghouse, this county boundary layer is updated frequently, as Los Alamos County GIS continues to find the boundary markers that define its borders on the ground. The goal is to have all the border points and angle points GPS'd and accurate to within 12 inches. Where markers are missing, these points are derived from published plats and surveys.
Description: The TIGER/Line Shapefiles are an extract of selected geographic and cartographic information from the Census MAF/TIGER database. The Census MAF/TIGER database represents a seamless national file with no overlaps or gaps between parts. However, each TIGER/Line Shapefile is designed to stand alone as an independent data set or the shapefiles can be combined to cover the whole nation.
Description: The TIGER/Line Shapefiles are an extract of selected geographic and cartographic information from the Census MAF/TIGER database. The Census MAF/TIGER database represents a seamless national file with no overlaps or gaps between parts. However, each TIGER/Line Shapefile is designed to stand alone as an independent data set or the shapefiles can be combined to cover the whole nation.
Description: These data represent the parcel boundaries for Los Alamos County, and include attributes from which many other properties can be derived - zoning, land use, ownership, communities, subdivisions, voting districts, etc. The data were originally developed from filed plats, and in 2015 were completely reviewed and cleaned up.