[Talk-ca] Using ImportImagePlugin in JOSM

[Peter Freeman]

I am unable to get the InstallImagePlugin to work in JOSM

GOAL
====

I have an image of a map that I scanned and I want to load it into JOSM
as an underlay so I can trace the ways on the map in JOSM.

PREPARATION
============

The map file is called map.jpg and I have created a world file called
map.wld

TRIALS
======

I don't fully understand the values I need for the world file, however
it represents an area approximately 8 kilometres (West to East) by 6
kilometres (North to South) and the top left hand edge of the map is
approximately at a latitude of  1.5 (North) and a longitude of 103.5
(East) so I looked at this link: 
http://en.wikipedia.org/wiki/World_file and my file contains these
values as a starting point:

100.0
0.0
0.0
-100.0
103.5
1.5

When I load the image, the plugin notices that I don't have a projection
file (.prj) so it asks me if I want the default coordinate system.  I
choose Yes.  Nothing appears and the scale (top left corner of JOSM goes
to 20037.5 and I cannot zoom in or out.  I have varied the values in the
world file considerably but with the same result.

QUESTIONS
==========

Has anyone used this plugin?
Can you give me reasonably correct values for my world file?
Do I need to create a projection file
What do I need to do to make this work?

Thank you,

Peter


-- 

Peter Freeman
180 Musgrave Place
Salt Spring Island, V8K 1V5
British Columbia, Canada
(250) 653-4623
http://members.shaw.ca/petersfreeman
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