USGS DEM

The USGS DEM standard is a geospatial file format developed by the United States Geological Survey for storing a raster-based digital elevation model. It is an open standard, and is used throughout the world. It has been superseded by the USGS's own SDTS format but the format remains popular due to large numbers of legacy files, self-containment, relatively simple field structure and broad, mature software support.

DEM Level

A USGS DEM can be classified into one of four levels of quality. This is due to the multiple methods of data collection, and certainty in the data.

Format Structure

The USGS DEM format is a self-contained (single file) set of ASCII-encoded (text) 1024-byte (1024 ASCII chars) blocks that fall into three record categories called A, B, and C. There is no cross-platform ambiguity since line ending control codes are not used, and all data including numbers is represented in readable text form. There is no known binary analogue of the format, although it is common practice to compress the files with gzip.

Demai (Talmud)

Demai (Hebrew: דמאי) is the third tractate of Seder Zeraim ("Order of Seeds") of the Mishnah and of the Talmud. There is some debate as to the literal meaning and origin of the word. It is concerned mainly with laws related to produce where it is suspected that ma'aser rishon (the first tithe for the Levi), terumat ma'aser and ma'aser sheini (the second tithe) or ma'aser ani (the tithe for the poor), depending on the year of the Shemittah cycle, have not been properly separated in accordance with Num. 18:24-28. It consists of seven chapters and has a Gemara from only the Jerusalem Talmud.

DEM (disambiguation)

DEM was the ISO 4217 currency code for the Deutsche Mark, former currency of Germany.

DEM or Dem can also refer to:

Computing

  • Digital elevation model, a digital representation of ground-surface topography or terrain
    • .dem, a common extension for USGS DEM files
  • .dem, a common extension for USGS DEM files
  • Diffuse element method, a numerical simulation method used (for example) to solve partial differential equations
  • Discrete element method or discrete element modeling, a family of numerical methods for computing the motion of a large number of small particles (like molecules or grains of sand)
  • Display Encode Mode, a feature of the AMD's Video Codec Engine
  • Distance Estimation Method, for drawing Julia sets or Mandelbrot sets
  • Organisations

  • Department of Environmental Management, a name of various government entities
  • Democrats (Brazil), political party
  • Other uses

  • Deus ex machina (Latin; literally "a god from a machine"), a resolution to a story that does not pay due regard to the story's internal logic and that is so unlikely that it challenges suspension of disbelief, and presumably allows the author, director, or developer to end the story in the way that he or she desired
  • Podcasts:

    PLAYLIST TIME:

    Dem Evil

    by: Merital Family

    [Hook:]
    (Merital)
    Cause in li-I-I-ife
    Yuh cyan trust no one
    Yuh really cyan trust no one
    Not even the people yuh kno-o-o-w
    Move fast, cause dem really waan yuh die slow
    So dem a chatta bagga tings a mi seh mi nuh matta dem
    Because words can't bring mi down
    And all di oil dem a dash and all di powda dem a flash
    None a dem cyan tek my crown
    [Chorus:]
    Mi know dem evil
    From mi a grow mi nuh trust people
    Nuh tek check from certain vehicle
    Keep your enemy far but watch yuh friend dem like a eagle
    Dem evil
    From mi a grow mi nuh trust people
    Nuh tek check from certain vehicle
    Keep your enemy far but watch yuh friend dem like a eagle
    [Verse 1:]
    Don't trust the streets
    Weh yuh walk inna
    Corruption, mi nuh tek part inna
    Remember di eagle and di hawk in ya
    From mi likkle and a grow mi a born wi nah don't turn yuh back
    And the one yuh open the door, don't let no one mislead you
    Why you wanna tek what's mine
    You don't satisfied
    Mi seh yuh likkle greed u
    [Hook:]
    Cause in li-I-I-ife
    Yuh cyan trust no one
    Yuh really cyan trust no one
    Not even the people yuh kno-o-o-w
    Move fast, cause dem really waan yuh die slow
    So dem a chatta bagga tings a mi seh mi nuh matta dem
    Because words can't bring mi down
    And all di oil dem a dash and all di powda dem a flash
    None a dem cyan tek my crown
    [Chorus:]
    Mi know dem evil
    From mi a grow mi nuh trust people
    Nuh tek check from certain vehicle
    Keep your enemy far but watch yuh friend dem like a eagle
    Dem evil
    From mi a grow mi nuh trust people
    Nuh tek check from certain vehicle
    Keep your enemy far but watch yuh friend dem like a eagle
    [Verse 2:]
    As mi back
    When dem a chat and think mi nuh know
    Dem cyan tek mi fi poppy show
    Mamma done tell mi seh, know mi friend from mi foe
    Cah di wicked heart cold like snow
    So dem a chatta bagga tings a mi seh mi nuh matta dem
    Because words can't bring mi down
    And all di oil dem a dash and all di powda dem a flash
    None a dem cyan tek mi crown
    [Hook:]
    Cause in li-I-I-ife
    Yuh cyan trust no one
    Yuh really cyan trust no one
    Not even the people yuh kno-o-o-w
    Move fast, cause dem really waan yuh die slow
    Cause in li-I-I-ife
    Yuh cyan trust no one
    Yuh really cyan trust no one
    Not even the people yuh kno-o-o-w




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