In case someone needs the conventional Mercator projection, here it is:

import math

see conversion formulas at

http://en.wikipedia.org/wiki/Transverse_Mercator_projection

and

http://mathworld.wolfram.com/MercatorProjection.html

class Mercator:
radius = 6378137

def __init__(self, **kwargs):
    # setting default values
    self.lat = 0 # in degrees
    self.lon = 0 # in degrees
    self.k = 1 # scale factor
    
    for attr in kwargs:
        setattr(self, attr, kwargs[attr])
    self.latInRadians = math.radians(self.lat)

def fromGeographic(self, lat, lon):
    lat = math.radians(lat - self.lat)
    lon = math.radians(lon - self.lon)
    x = self.k * self.radius * lon
    y = self.k * self.radius * math.log( math.tan(lat) + (1 / math.cos(lat)))
    return (x,y)

def toGeographic(self, x, y):
    x = x/(self.k * self.radius)
    y = y/(self.k * self.radius)

    lat = math.degrees(lat)
    lon = self.lon + math.degrees(lon)
    return (lat, lon)

Hello!
I installed the addon and tried to open the ".hgt" file. But the ".hgt" file is invisible in the blender. How to fix this?

Hi,
I'm trying to use this add-on in Blender 2.80, however, some work need to be done in order to make this add-on compatible.
As I am a complete Blender- AND python-noob, I would'nt know how to start this.
However, it might be not so difficult after all: https://theduckcow.com/2019/update-addons-both-blender-28-and-27-support/

Is there any plan to support 2.80?

When I install the addon it says its installed but it is not showing up under file import
I have closed and reopened blender a couple of times but its still not showing up
Any Ideas

Cheers

-Windows 10
-Blender 2.78
Running the addon produced the following error message in the console:

Read new prefs: C:\Users\Nnamdi\AppData\Roaming\Blender Foundation\Blender\2.78\config\userpref.blend
found bundled python: C:\Program Files\Blender Foundation\Blender\2.78\python
add_window: added to phytonpath
window: Imported multifiles
Downloading the file from https://s3.amazonaws.com/elevation-tiles-prod/skadi/S03/S03E036.hgt.gz...
Saving the file to C:\Users\Nnamdi\Google Drive2\Oath to the Ancestors\Shrine of Ancestral Divinity\Terrain\S04E037.hgt\S03E036.hgt.gz... Done.
Downloading the file from https://s3.amazonaws.com/elevation-tiles-prod/skadi/S03/S03E037.hgt.gz...
Saving the file to C:\Users\Nnamdi\Google Drive2\Oath to the Ancestors\Shrine of Ancestral Divinity\Terrain\S04E037.hgt\S03E037.hgt.gz... Done.
Downloading the file from https://s3.amazonaws.com/elevation-tiles-prod/skadi/S03/S03E038.hgt.gz...
Saving the file to C:\Users\Nnamdi\Google Drive2\Oath to the Ancestors\Shrine of Ancestral Divinity\Terrain\S04E037.hgt\S03E038.hgt.gz... Done.
Downloading the file from https://s3.amazonaws.com/elevation-tiles-prod/skadi/S04/S04E036.hgt.gz...
Saving the file to C:\Users\Nnamdi\Google Drive2\Oath to the Ancestors\Shrine of Ancestral Divinity\Terrain\S04E037.hgt\S04E036.hgt.gz... Done.
Downloading the file from https://s3.amazonaws.com/elevation-tiles-prod/skadi/S04/S04E038.hgt.gz...
Saving the file to C:\Users\Nnamdi\Google Drive2\Oath to the Ancestors\Shrine of Ancestral Divinity\Terrain\S04E037.hgt\S04E038.hgt.gz... Done.
Traceback (most recent call last):
File "C:\Users\Nnamdi\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\blender-terrain-master_init_.py", line 205, in execute
srtm.build(verts, indices)
File "C:\Users\Nnamdi\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\blender-terrain-master_init_.py", line 338, in build
z = struct.unpack('>h', buf)[0]
struct.error: unpack requires a bytes object of length 2

location: :-1

location: :-1

I am unable to use the add-on, still it shows an error "Upgrade to 2.8x required"