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Storm Watch over USA with Stream Flood Status

Below you should see interactive map with active hurricane tracking over USA (Atlantic and Pacific). Also Weather Radar with current precipitation, next several days flooding outlook areas. Different color square markers indicate major river flood status with links to USGS site showing up-to-date water level and projected flooding. Purple squares - major flooding on-going. To see legend and toggle layers click on >> in top left corner.

Frequently asked questions (FAQ) on electrical geophysical equipment and software

How to convert conductivity to resistivity?

Are there any difference between LandMapper ERM-01 and other equipment available on the market?

How your equipment calculates electrical resistivity?

How to calculate geometrical coefficient K?

Does electrical resistivity correlate with any soil properties?

Can your equipment measure electrical resistivity/conductivity in soil and water samples?

How to determine the depth of the measurements?

More help...

How to convert conductivity to resistivity?

Electrical resistivity (ER) is reciprocal to conductivity (EC) and results can be easily recalculated using formula EC=1/ER or vice versa ER=1/EC. Electrical resistivity is more convenient to use on non-saline soils, where conductivity can be mSm/m, while resitivity measures in 102-103 Ohm m range. 1000 Ohm m equals 1 mSm/m. You can find more conversions to ppm, TDS, grains of salt in this flyer.

Happy New 2017 Year!

 

All of us at Landviser, LLC (USA) and IP GeoPro (Russia) are wishing our friends, collegues, customers and everybody else around the world Happy Holidays and a Great New Year! Looking forward to change, trust and fairness for all in 2017!!! We, as a small geo-consulting company, would continue to do our best in studying our Morther Earth and bringing Joy to the World!

Happy New 2016 Year!

All of us at Landviser, LLC (USA) and IP GeoPro (Russia) are wishing our friends, collegues, customers and everybody else around the world Happy Holidays and Great New Year!

С Новым 2015 Годом!

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

2015ru

С Нового Года мы расширяем ассортимент геотехнических услуг и предлагаем разнообразное геофизическое оборудование произведенное в России: наш эксклюзивный портативный прибор измеряющий электрическое сопротивление, проводимость и потенциал, LandMapper; электромагнитный сканнер АЭМП-14 и 16-канальную 64-электродную установку (500 м глубинная томография), Скала-64 (КБ Электрометрии, Новосибирск)! Наши приборы не имеют аналогов и пользуются популярностью во всем мире.

Также:

ГПС отечественных и зарубежных производителей. Помощь в логистике по импорту-экспорту геотехнического оборудования из США

ГИС и Геофизические консультации и классы на русском и английском

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

Мы работаем с KB Electrometry (Россия), GeoTOMO Software (Австралия/Малайзия),  ГПС производители - Trimble и F4Devices  (США), портативные агро-химические лаборатории LaMotte (США) и многими другими.

Tips and Tricks for linking data in ArcGIS

There are two basic types of joins in GIS tables and geo-data: spatial and relational (based on table IDs). Spatial join is the key concept in GIS and that is what sets all GIS technologies apart from other relational databases. Here we start with performing relational joint of list of zipcodes with names to the US zipcode shapefile.

Relational Join

To join table to shapefile based on ID (zipcode) the data type in the column you are planning to join should be the same. Let’s check on data type in Zip code shapefile. Right click on shapefile, select properties and look under Fields tab. The format of the data is Text and size is 5 digits.

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Converting multiple KML files into geodatabase for GIS project in ArcMap Desktop

Google Earth is wide-spread free GIS application which allows users to draw their own point, lines and polygons. Very often users create many separate files in KML or KMZ format and upon moving to the next step in GIS analysis are trying to recreate the same geographies in ArcGIS editing software. The fastest way to bring all those custom data into GIS project is described here. Assuming that you have Google Earth and ArcGIS Desktop 10.2 installed, bring all the KML/KMZ files into Google Earth through File\Open (you can select multiple files from the same folder):

2D Dipole-Dipole Electrical Tomography with LandMapper

Manual measuring of electrical resistivity 2D cross-section is possible with LandMapper with supplied (optional) or made by user cable set.

There are two modifications of 2D cable set offered and tested by Landviser, LLC:

  1. Mobile shallow (~2 m depth) set consisted of two T-style probes (AB and MN dipoles) similar to mapping probes. The dipoles are set at 1 m size with possible separation between dipoles (wire length) no more than 5 meters (n=5).
  2. Stationary set (~ 14 m depth) where electrodes are hammered on the soil surface along the straight line at one meter distance. Electrodes are simple metal spikes/nails and is sourced locally (are NOT provided by Landviser, LLC). We supply wires with banana-plug connections to LandMapper terminals on one end and alligator clips on the other end to connect with electrodes.

Principle of measurements with both sets is the same for both cable sets and is illustrated by figure below. You can also watch instructional videos on our YouTube Channel - LandviserLLC

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0° 34' 51.8304" N, 71° 51' 2.1096" W
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