Bangladesh Tranverse Mercetor (BTM)

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Bangladesh Transverse Mercator (BTM)

A projected coordinate system has a flat, 2D surface with constant lengths, angles, and areas across the two dimensions. Which makes it easier to calculate properties  like area, distance of a object in map. UTM (Universal Transverse Mercator) is a widely used projected coordinate system which divides the Earth into sixty zones, each in six-degree interval.

As Bangladesh lies between UTM Zone 45N and 46N, FAP19 has adopted a Transverse Mercator projection for Bangladesh. Parameter of this projection are

NAMEBANGLADESH TRANSVERSE MERCATOR (BTM)
ProjectionTransverse_Mercator
False_Easting500000
False_Northing-2000000
Central_Meridian90
Scale_Factor0.9996
Latitude_Of_Origin0
Linear UnitMeter (1.0)
Geographic Coordinate SystemGCS_Everest_1830
Angular UnitDegree (0.0174532925199433)
Prime MeridianGreenwich (0.0)
DatumD_Everest_1830
SpheroidEverest_1830
Semimajor Axis6377299.36
Semiminor Axis6356098.352
Inverse Flattening300.8017

Please note that its necessary to apply datum transformation parameter in order to convert from any coordinate system that uses Everest 1830 datum to a coordinate system that used WGS 1984 datum, required datum transformation parameters –

METHODGEOCENTRIC_TRANSLATION
ΔX283.729m
ΔY735.942m
ΔZ261.143m

Also note that these parameter values will be negative when transforming from WGS 1984 to Everest 1830.




To Learn More Click Here

For Download click Bangladesh Tranverse Mercetor (BTM). Now Extract and import which referenceing.

Adapted from Shajol Jahid


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