Section 3 - Template 20 : Polar stereographic projection

Templates for Section 3

More Sections

Octets Key Type Content
15 shapeOfTheEarth codetable Shape of the earth (see Code Table 3.2)
16 scaleFactorOfRadiusOfSphericalEarth unsigned Scale factor of radius of spherical earth
17-20 scaledValueOfRadiusOfSphericalEarth unsigned Scaled value of radius of spherical earth
21 scaleFactorOfMajorAxisOfOblateSpheroidEarth unsigned Scale factor of major axis of oblate spheroid earth
22-25 scaledValueOfMajorAxisOfOblateSpheroidEarth unsigned Scaled value of major axis of oblate spheroid earth
26 scaleFactorOfMinorAxisOfOblateSpheroidEarth unsigned Scale factor of minor axis of oblate spheroid earth
27-30 scaledValueOfMinorAxisOfOblateSpheroidEarth unsigned Scaled value of minor axis of oblate spheroid earth
31-34 Nx unsigned Nx - number of points along X-axis
35-38 Ny unsigned Ny - number of points along Y-axis
39-42 latitudeOfFirstGridPoint signed La1 - latitude of first grid point
43-46 longitudeOfFirstGridPoint unsigned Lo1 - longitude of first grid point
47 resolutionAndComponentFlag codeflag Resolution and component flag (see flag table 3.3 and Note 1)
48-51 LaD signed LaD - Latitude where Dx and Dy are specified
52-55 orientationOfTheGrid signed LoV - orientation of the grid (see Note 2)
56-59 Dx unsigned Dx - X-direction grid length (see Note 3)
60-63 Dy unsigned Dy - Y-direction grid length (see Note 3)
64 projectionCentreFlag codeflag Projection centre flag (See Flag Table 3.5)
65 scanningMode codeflag Scanning mode (see flag table 3.4)
Notes:

( 1) The resolution flag (bit 3-4 of Flag table 3.3) is not applicable.

( 2) LoV is the longitude value of the meridian which is parallel to the Y-axis (or columns of the grid) along which latitude increases as the Y-coordinate increases (the orientation longitude may or may not appear on a particular grid).

( 3) Grid length is in units of 10-3 m at the latitude specified by LaD.

( 4) Bit 2 of the projection flag is not applicable to the polar stereographic projection.

( 5) A scaled value of radius of spherical Earth, or major or minor axis of oblate spheroid Earth is derived from applying appropriate scale factor to the value expressed in metres.