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Figure 1 – Vertical benchmark comparison. NV-GPS elevations were derived using Geoid99 to match original surveys. NGS OPUS elevations were
derived using Geoid18. All elevations are NAVD88.
Figure21 – Horizontal benchmark comparison. Published values were taken from county and city public sources. NV-GPS coordinates are derived
from network VRS solutions in NAD83/94. All coordinates are ground values.
Help Wanted
The Lahontan Chapter of the Nevada Association of
Land Surveyors will be working with the UGRC to not
only update the coordinate reference frame, but also
establishing and adding new locations for base stations.
A focus will be on establishing and connecting stations
east along the I-80 and US-50 corridors with eventually
being able to integrate the NVGPS network with the UTAH
TURN network. NALS welcomes all private firms and public
agencies to assist with this endeavor. Potential locations
for base stations need to be secured, as well as the need
for periodic maintenance should a base station incur a
technical glitch. Please reach out to any Lahontan Chapter
representative if you can lend a hand!
The Nevada Traverse Vol.49, No.3, 2022 19
