I want to find out GPS for land measurement that can be used for agriculture or survey?

A GPS that can be used for farm planning and assessing soil properties

I want to find out GPS for land measurement that can be used for agriculture or survey?
Trust me there are GPS programs accurate and precise enough to do surveying. I don't know where you're at, but I work for Western Farm Service (may be Crop Production Services near you) and I spend about half of my time making GPS maps for growers. I use a Trimble "AG GPS" running "Farm GPS" software. I don't know who makes the software off the top of my head, and I am not on my work computer. I am sure that this system makes acreage maps accurate to the thousandth of an acre. Assessing the soil properties is easy , just have to pay for all the processing of many samples (unless you mean using GIS to assess soil properties, which I know nothing about).
Reply:I dont think you can. The us military specifically ruled out making GPS good enough to measure down past i think about 50 foot, and land surveys need down to about a couple inches or more. Think neighbors fighting over a fence between their yards.
Reply:Two words: Google Earth.
Reply:crop dusters use gps to map out the fields they are dusting. you might be able to find something ground orientated from an ag-aircraft supplier.
Reply:Dependent upon your location, there are several diffent GPS style of instruments for doing the work that you are requiring. I have not directly used this equipment but have received the reports for fields that were measured by GPS tracking units placed on a four wheeler. Again this same type of equipment is used by surveyors for marking their points. Seek out this equipment online under GPS tracking or under surveyors equipment. With a little research you will find what you need. This equipment is accurate for most of our needs. Good luck.
Reply:A GPS can be used for agricultural measurement for the design of irrigation, stock watering etc.





although the reading may be out over the long run the error is small enough over short periods.





Surveying require accuracy's of less than a mm





The WGS84 system based on satellite and GPS technology showed errors in surveying by triangulation.
Reply:Garmin Map 76: easy to upload/download to computer, has area measurement tools, waterproof and floats! Usual real world accuracy is 5-10 metres/yards with good satellite coverage, better at certain times of the day.