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GPS / mobile GIS in the field

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iTrek Z1 GPS datalogger precision test

Sun, 2008-04-06 13:58 — nico

The iTrek Z1 datalogger GPS with a solar panel is based on the MTK chipset produced beginning in Q1 2007. I brought this GPS data logger, along with three other GPS units, on an ethnoarchaeological research project in Peru in 2007 where we travelled with a traditional salt-bearing caravan for 14 days, and I gathered 9 days of data logging with the iTrek Z1. I conducted this test to evaluate the precision of the GPS in the southern hemiphere where there is no WAAS.

Correcting GPS data using the Arequipa base station in Trimble software

Thu, 2007-08-02 02:16 — admin

The Arequipa, Perú GPS Base Station

UPDATE (Aug 2009): With some prompting Trimble has added AREQ back in the list of SOPAC reference stations for differential correction. If Arequipa Laser Station (AREQ), Peru doesn't appear in Pathfinder Office Differential Correction provider list, click the "Update List" button.

Using recreational-grade GPS units for fieldwork

Sat, 2007-04-14 17:25 — nico

GPS technology has greatly simplified the process of locating sites and features on the landscape and mapping positions, linear features, and areas. There are two main groups of GPS units used by field scientists: "recreational" and "mapping" grade GPS units. This post is about using Recreational GPS units for fieldwork in 2006.

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