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  2. Therion (software) - Wikipedia

    en.wikipedia.org/wiki/Therion_(software)

    therion .speleo .sk. Therion is free and open-source cave surveying software designed to process survey data, generate maps and 3D models of caves, and archive [3] the data describing the cave and the history of exploration. Therion was developed by the Slovak cavers Martin Budaj and Stacho Mudrak [4] but is available in English.

  3. Total dissolved solids - Wikipedia

    en.wikipedia.org/wiki/Total_dissolved_solids

    Total dissolved solids ( TDS) is a measure of the dissolved combined content of all inorganic and organic substances present in a liquid in molecular, ionized, or micro-granular ( colloidal sol) suspended form. TDS are often measured in parts per million (ppm). TDS in water can be measured using a digital meter.

  4. Free stationing - Wikipedia

    en.wikipedia.org/wiki/Free_stationing

    Free stationing. In surveying, free stationing (also known as resection) is a method of determining a location of one unknown point in relation to known points. [1] There is a zero point of reference called a total station. The instrument can be freely positioned so that all survey points are at a suitable sight from the instrument.

  5. Tabular Data Stream - Wikipedia

    en.wikipedia.org/wiki/Tabular_Data_Stream

    Tabular Data Stream. Tabular Data Stream ( TDS) is an application layer protocol used to transfer data between a database server and a client. It was initially designed and developed by Sybase Inc. for their Sybase SQL Server relational database engine in 1984, and later by Microsoft in Microsoft SQL Server .

  6. LimeSurvey - Wikipedia

    en.wikipedia.org/wiki/LimeSurvey

    LimeSurvey (formerly PHPSurveyor) is a free and open source online statistical survey web app written in PHP using a MySQL, SQLite, PostgreSQL or MSSQL database, distributed under the GNU General Public License. [1] Its web interface enables users to develop and publish online surveys, collect responses, review statistics, and export the ...

  7. Surveying - Wikipedia

    en.wikipedia.org/wiki/Surveying

    Surveying. A surveyor using a total station. A student using a theodolite in field. Surveying or land surveying is the technique, profession, art, and science of determining the terrestrial two-dimensional or three-dimensional positions of points and the distances and angles between them. These points are usually on the surface of the Earth ...

  8. Public Land Survey System - Wikipedia

    en.wikipedia.org/wiki/Public_Land_Survey_System

    The Public Land Survey System ( PLSS) is the surveying method developed and used in the United States to plat, or divide, real property for sale and settling. Also known as the Rectangular Survey System, it was created by the Land Ordinance of 1785 to survey land ceded to the United States by the Treaty of Paris in 1783, following the end of ...

  9. Survey methodology - Wikipedia

    en.wikipedia.org/wiki/Survey_methodology

    Survey methodology is "the study of survey methods". As a field of applied statistics concentrating on human-research surveys, survey methodology studies the sampling of individual units from a population and associated techniques of survey data collection, such as questionnaire construction and methods for improving the number and accuracy of responses to surveys.

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