Bangladesh Tranverse Mercetor (BTM)

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

NAME	BANGLADESH TRANSVERSE MERCATOR (BTM)
Projection	Transverse_Mercator
False_Easting	500000
False_Northing	-2000000
Central_Meridian	90
Scale_Factor	0.9996
Latitude_Of_Origin	0
Linear Unit	Meter (1.0)
Geographic Coordinate System	GCS_Everest_1830
Angular Unit	Degree (0.0174532925199433)
Prime Meridian	Greenwich (0.0)
Datum	D_Everest_1830
Spheroid	Everest_1830
Semimajor Axis	6377299.36
Semiminor Axis	6356098.352
Inverse Flattening	300.8017

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 –

METHOD	GEOCENTRIC_TRANSLATION
ΔX	283.729m
ΔY	735.942m
ΔZ	261.143m

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

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

Adapted from Shajol Jahid