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Happy New Year 2015!

Landviser wishes  all our clients, colleagues and friends happy holidays, as well as healthy and prosperous New Year!

Желаем всем нашим друзьям и коллегам веселых праздников, а также счастья, здоровья и успехов в Новом Году!

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Landviser now offers complete line of electrical geophysical equipment and software: from our exclusive simple hand-held resistivity and self-potential meters, LandMappers, to the most sophisticated 16-channel, 64-electrode automatic RES/IP tomography set, SibER-64! Also:

GPS data loggers: cost-effective rugged data loggers, inclinometers, distance scanners and cameras from F4Devices

GIS & Geophysics consulting: on-site and remote classes and support available worldwide

Customized Solutions: No project is too big or too small!

Call: +1-609-412-0555 or 888-306-LAND

Email: info@landviser.net     Web: www.landviser.net

Landviser, LLC (USA) is authorized distributor for KB Electrometry (Russia), GeoTOMO Software (Australia/Malaysia) and F4Devices (USA)

Geo-Equipment

Landviser develops and sells unique hand-held geophysical devices and powerful electrical geophysical equipment. We are collaborating with KB "Electrometry", Russia and GeoTOMO Software, Malaysia.

Low-cost GPS logger

I had tested a small gadget called GPS logger from Columbus Visiontac. Complete product name-description is:

Product name

Product Features

Where to buy

 

Columbus V-990 GPS Data Logger (microSD Slot, Voice Recording, 66 ch. MTK)

 

  • A good data logger still needs practical track processing software. Time Album attached to V-990 can help you freely process track.Time Album has various personalized settings.
  • It can export track according to distance or time, select metric or imperial unit or record intervals, and support various operating systems including WINDOWS, MAC OS and LINUX.
  • V-990 adopts the currently most advanced and stable MTKII 3329 super single chip, with only 35s and 1s required respectively for cold start and warm start.
  • It can realize rapid and stable positioning under various environments including urban district and suburb.
  • The built-in high-capacity Li-polymer battery can allow you to use the device all day (24hrs).

Columbus V-900 Bluetooth GPS Data Logger (microSD , Voice Tag for POI, Driverless, Push to Log, 25 millions waypoints*, XP / Vista/ Linux / Mac OSX Compatible)

  • 51 channels MTK chipset with enhanced positioning system technology (up to 1.5m accuracy with EPS Technology
  • Voice-Tag function with built-in microphone allows adding live voice labels to any waypoint
  • MicroSD Slot with support up to 2GB* capacity (about 25,000,000 waypoints, more than 2 years) *NOTE: 1GB microSD card is optional in the package
  • Push-To-Log (POI anchor key) enables you to mark a POI at any time
  • Unique SPY mode allows continuous standby logging of more than one month

Locations

Seatle 47° 36' 22.356" N, 122° 19' 55.4556" W
32° 19' 45.2136" N, 142° 1' 52.5" E

Extracting Geographical Lat-Long data from Google Earth KML / KMZ files to Excel

If you have some data in table format with IDs for fields or point locations on the map and Google Earth KML file with those fields having same IDs, it is generally possible to bring spatial information to Excel and merge those data sources together to use in further spatial analysis in other GIS software and in newly released FREE ESRI Maps for MS Office Beta 2. There are a few little tricks to it, though…

Google Earth KML files are essentially XML files with geographical information, but Excel will not open them directly.

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Using LandMapper to Monitor Soil Salinity and Mitigate Its Effects on Rice Production at US Gulf Coast

Landmapper - Portable and Scalable EC meterMost of the soils along US Gulf Coast are naturally slightly saline and some are waterlogged during much of the growing season. Naturally, those areas are used for rice production rotated with cattle grazing or hay growing. Soil salinity of those areas varies spatially and temporarily due to drought, hurricane-pushed sea water surges, micro-elevation within fields, variability of salinity levels in irrigation water. Monitoring soil and water salinity with conventional techniques of collecting soil samples by farmer and sending them to outside lab is costly and time-consuming. Such approach fails to provide timely advice to the farmer regarding crop selection pre-planting and mitigation inputs during the growing season. Several rice farms affected by Katrina and Ike hurricanes were monitored in 2006-2011 utilizing field soil EC meter, LandMapper ERM-02, consumer-grade GPS, and other common equipment available to a farmer. On six test fields EC values were recorded with LandMapper directly in the field at 30 locations in less than 45 min.

Cite this presentation:

Golovko, Larisa, and Anatoly Pozdnyakov. “Using LandMapper to Monitor Soil Salinity and Mitigate Its Effects on Rice Production at US Gulf Coast.” In Making Waves: Geophysical Innovations for a Thirsty World. Tucson  AZ: Environmental and Engineering Geophysical Society, 2012. http://www.landviser.net/webfm_send/94.SAGEEP 25 - 2012 - Tucson, AZ

Registered users can download full proceeding paper: 
 

Using LandMapper to Monitor Soil Salinity and Mitigate Its Effects on Rice Production at US Gulf Coast

Locations

Winnie, TX 29° 49' 12.7956" N, 94° 23' 2.6808" W
SAGEEP 2012 Tucson, AZ 32° 13' 18.2748" N, 110° 55' 35.3244" W

How-to use LandMapper and consumer-grade GPS data-logger to quickly map salinity on farm fields

GPS waypoints in Google EarthTask on hand: estimate salinity level on fields planned for rice next year. Six fields with total area of 322 acres were selected by farmer.

Equipment on hand: two LandMappers with different size probes attached (measuring electrical conductivity (EC) down to ~ 8” and 18”), Columbus GPS data-logger, all-road vehicle or “Mule”. Three people: farmer driving a '”mule” and recording data on paper, one person measuring with Landmapper at 18” depth, other person measuring EC with LandMapper to 8” depth and recording POI or way points with GPS. Results: 30 points recorded in less than 1.5 hour (including about 45 min break to wait out the rain). EC in the field varied from 5 mS/m to 106 mS/m on surface; and from 19 mS/m to 400 mS/m in deeper layer.

Location

Farm Winnie, TX 29° 36' 14.6448" N, 94° 21' 7.0524" W
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