1. Home
  2. |  
  3. Civil Services |  

UPSC IAS Prelims Exam: Environment and Ecology: Glossary of Terms -1

Sep 22, 2015 18:55 IST

    Environment and Ecology is a very important component of the IAS Prelims Syllabus. Though it was seperated in the year 2011, but it asked in each of the IAS Prelims General Studies Paper in one or the other form. Previously it was covered under the Geography. It has a highly technical terminology and the candidates need to know the explaniation and definition of the terms used in Environment and Ecology.

    Glossary

    Block Plantation

    Tree plantations in compact blocks of more than 0.1 ha on lands outside recorded forest area.

    Canopy

    The cover of branches and foliage formed by the crown of trees.

    Canopy Density

    Percent area of land covered by the canopy of trees, It is expressed as a decimal coefficient, taking closed canopy as unity.

    Cartographic Limit

    The minimum area of a feature which can be presented on a map at a given scale.

    Change Matrix

    It presents change in forest cover classes for a given region (State or UT) during the period of two consecutive assessments in a matrix form by showing the changes of area from one class to
    another.

    Crown Area

    It is the area of horizontal projection of a tree crown on the ground.

    Culturable Non Forest Area (CNFA)

    It is the net geographical area, lying outside recorded forest and forest cover, which can support tree vegetation (thus, excluding areas under wetlands, riverbeds, perennial snow covered mountains, etc.). CNFA is the area over which the sample data on tree cover is aggregated for the assessment of tree cover.

    Digital Image Processing (DIP)

    Interpretation and classification of digital satellite data using computer and a DIP software.

    Error Matrix (Confusion matrix)

    It is a means to quantitatively assess the accuracy of classification of an interpreted satellite data. Under this, the reference data (ground truth) is compared with the corresponding results of the classification on the randomly selected locations on category-by-category basis. It is presented in a square matrix.

    Register to get FREE updates

      All Fields Mandatory
    • (Ex:9123456789)
    • Please Select Your Interest
    • Please specify

    • ajax-loader
    • A verifcation code has been sent to
      your mobile number

      Please enter the verification code below

    This website uses cookie or similar technologies, to enhance your browsing experience and provide personalised recommendations. By continuing to use our website, you agree to our Privacy Policy and Cookie Policy. OK
    X

    Register to view Complete PDF