Topographic measurements of Little Holland Tract, Sacramento-San Joaquin Delta, California, 2015, using backpack GPS

Topographic data were collected by the U.S. Geological Survey (USGS) in 2015 for Little Holland Tract in the Sacramento-San Joaquin River Delta, California. The data were collected on foot using a global positioning system (GPS) backpack platform that consisted of survey-grade Trimble R10 and R7 global navigation satellite system (GNSS) receivers with Zephyr 2 antennas. Orthometric elevations relative to NAVD88 were computed using the National Geodetic Survey Geoid12a, and the final data were projected in Cartesian coordinates using the UTM Zone 10 North (meters) (NAD83[2011]) coordinate system. The mean estimated vertical uncertainty of the 2015 USGS GPS backpack survey is 3.5 cm. 

Data and Resources

Field Value
accessLevel public
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identifier USGS:56671ef1e4b06a3ea36c8bf5
metadata_type geospatial
modified 20201019
old-spatial -121.666347272, 38.310742125, -121.64879356, 38.350117093
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
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source_hash be1253d62ab70aee99dab26f0689ec258fc542e8
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spatial {"type": "Polygon", "coordinates": [[[-121.666347272, 38.310742125], [-121.666347272, 38.350117093], [ -121.64879356, 38.350117093], [ -121.64879356, 38.310742125], [-121.666347272, 38.310742125]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • bathymetry-and-elevation
  • ckan
  • elevation
  • geo
  • geoss
  • global-positioning-system-gps-observations
  • gps-global-positioning-system
  • gps-measurement
  • liberty-island
  • little-holland-tract
  • national
  • north-america
  • sacramento-river-deep-water-ship-channel
  • sacramento-san-joaquin-delta
  • solano-county
  • united-states
  • usgs-56671ef1e4b06a3ea36c8bf5
  • yolo-county
isopen False
license_id notspecified
license_title License not specified
maintainer PCMSC Science Data Coordinator
maintainer_email pcmsc_data@usgs.gov
metadata_created 2025-11-20T12:30:12.949099
metadata_modified 2025-11-20T12:30:12.949103
notes Topographic data were collected by the U.S. Geological Survey (USGS) in 2015 for Little Holland Tract in the Sacramento-San Joaquin River Delta, California. The data were collected on foot using a global positioning system (GPS) backpack platform that consisted of survey-grade Trimble R10 and R7 global navigation satellite system (GNSS) receivers with Zephyr 2 antennas. Orthometric elevations relative to NAVD88 were computed using the National Geodetic Survey Geoid12a, and the final data were projected in Cartesian coordinates using the UTM Zone 10 North (meters) (NAD83[2011]) coordinate system. The mean estimated vertical uncertainty of the 2015 USGS GPS backpack survey is 3.5 cm. 
num_resources 2
num_tags 20
title Topographic measurements of Little Holland Tract, Sacramento-San Joaquin Delta, California, 2015, using backpack GPS