Cool! We're still in the process of moving the project infrastructure for proj4js but in the meantime you can enter a ticket and patch in the Trac system at: http://trac.osgeo.org/proj4js/ And eventually it should make it's way into the code base.
Mike Stephen Irons wrote: > I have implemented a Proj4js transformation for New Zealand Map Grid > (NZMG) co-ordinates (EPSG:27200). spatial-reference.org > <http://spatial-reference.org> gives a description of the > transformation, but the '+proj=nzmg' was not available in the current > version in the repository. This projection is not related to any of > the existing types, so I implemented it. > > I would like to contribute this code to Proj4js. However, it is not > obvious how to submit this code to the project. Can anyone here point > me to the right place? > > Stephen Irons > > > Background > > New Zealand Map Grid (NZMG) is a projection used to convert latitude > and longitude to easting and northing coordinates in metres. It was > designed to minimize the scale error over the land area of New Zealand > and cannot be used elsewhere. > > The New Zealand govnernment survey agency, LINZ (Land Information New > Zealand) has published two series of maps covering the mainland areas > of New Zealand. > > * 262-series is 1:250000 > * 260-series is 1:50000 > > These maps are available in printed form and are currently the only > large-scale maps of New Zealand widely available to the general > public. Vector data is also available. > > Various commercial concerns have scanned these maps, or generated > tiles from the vector data, and released products using these tiles. I > have one of these products and want to use the tiles with OpenLayers. > > New Zealand Map Grid > > New Zealand Map Grid was designed by Dr W. I. Reilly in 1973. Its > official specification is published as /New Zealand Map Grid/, > Department of Lands and Survey Technical Circular 1973/32. A scanned > image of the publication is available at > http://www.linz.govt.nz/docs/miscellaneous/nz-map-definition.pdf > > It is also described in /Conversion between Latitude and Longitude and > New Zealand Map Grid/, OSG Technical Report 4.1, 1998. This document > is available at http://www.linz.govt.nz/docs/miscellaneous/nzmg.pdf > > NZMG is given EPSG code EPSG:27200. It is defined at > http://spatialreference.org/ref/epsg/27200/proj4/ as > > * "+proj=nzmg +lat_0=-41 +lon_0=173 +x_0=2510000 +y_0=6023150 > +ellps=intl +datum=nzgd49 +units=m +no_defs" > > Now, most of this is known to Proj4js code. However, the projections > 'nzmg' is not know, and needs to be implemented. > > > ------------------------------------------------------------------------ > > _______________________________________________ > Dev mailing list > [email protected] > http://openlayers.org/mailman/listinfo/dev > _______________________________________________ Dev mailing list [email protected] http://openlayers.org/mailman/listinfo/dev
