Blog
Satellite Signals Steer Farmers Straight
Precision agriculture combines GPS, remote sensing, and GIS to capture large amounts of georeferenced data on spatial variations in soil types, moisture content, nutrient availability, and crop yields and then create and follow prescription maps. Until recently, it was difficult for growers to correlate soil and crop information with production techniques, so they generally treated...
The Hayden Example
Igor Kidinsky—known on this survey crew as Eager (The Kid)—carried the shovel and pick. Glenny Dale—known as Glutton (The Old Man)—carried the plans and metal detector. They had been looking for block corners and had found a mixture of old and new pins. Now they were looking for interior lot corners and came upon a...
A Re-imagined “24 Miles Round London”
Kristjana Williams, an Icelandic artist who lives and works in London, is fascinated by maps, mythical creatures, and Victorian engravings. She brings historical works of cartography back to life using vibrant, digital collages. Pictured here is her interpretation of Daniel Paterson’s “24 Miles Round London” map, originally published in 1791. Paterson’s map presents London’s surrounding...
xyHt links: 12/5/14
Funding at Risk as Work on UAV Standards Falls Behind US Army Geospatial Center Issues Imagery Contract Award to GeoNorth Airbus Defence and Space announces the Commercial Launch of SPOT 7 satellite. 02.12.2014 Eagle Point Software Expands Pinnacle Series Resources into BIM Solutions and Transportation SPAR Europe 2014 Topcon announces software add-on for Autodesk integration...
A Pennsylvania Traverse Low-Distortion Projection
This article coincides with the December 2014 xyHt print article, Transformation of Observations – Part 2. In the September 2013 issue of Professional Surveyor is Dr. Charles Ghilani’s excellent article entitled “Grid versus Ground.” The article demonstrates the error created by ignoring elevation in traverse computations and describes the numerical and logical errors inherent...
Low-cost DIY GPS Data Logger
It wasn’t that long ago when the ability to create a functioning GPS device was reserved for the big companies, academics, and those with money to burn. Today, thanks to the ever-increasing demand for consumer-grade GPS electronics (such as those in every smart phone), the availability of GPS integrated circuits (chips) has dramatically increased, while...
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