[OpenLayers-Users] OpenLayers do not detect Proj4js

Wed Feb 19 08:24:45 PST 2014

Hi again,

After a week working on another task I was able to come back to
reprojection in client side with proj4js.

You were right. I downloaded the proj4js 1.1 version and it wordked. It was
a matter of compatibility with OpenLayers 2.10.

Thank you very much for all the answers.

Cheers,

Juan Manuel Moreno Rivera.

Sección de Teledetección y SIG / Remote Sensing & GIS group

Instituto de Desarrollo Regional / Institute for Regional Development

Universidad de Castilla-La Mancha / University of Castilla-La Mancha

Tlf: +34 967599200 (Ext: 2623)
http://www.teledeteccionysig.es/

2014-02-11 20:22 GMT+01:00 Andreas Hocevar <ahocevar at boundlessgeo.com>:

> Bart is right.
>
> Andreas.
> On 11 Feb 2014 19:11, "Bart van den Eijnden" <bartvde at boundlessgeo.com>
> wrote:
>
>> My guess here is that OpenLayers 2.10 is not compatible with Proj4js 2.X.
>> Try Proj4js 1.1 instead.
>>
>> Best regards,
>> Bart
>>
>> --
>> Bart van den Eijnden
>> Front-end Developer | Boundless
>> @boundlessgeo
>>
>> On 11 Feb 2014, at 17:58, Juanma M. R. <juanma.mr at gmail.com> wrote:
>>
>> Hi,
>>
>> Thank you Robert. I already included a file with the CRS like that:
>>
>> <script TYPE="text/javascript" src="proj4js-2.1.0/lib/proj4.js"></script>
>> <script TYPE="text/javascript"
>> src="proj4js-2.1.0/lib/spider_srs.js"></script>
>> <script TYPE="text/javascript"
>> src="OpenLayers-2.10/OpenLayers.js"></script>
>>
>> with one line for each CRS like the ones from spatialreference.org:
>>
>> Proj4js.defs["EPSG:900913"] = "+proj=merc +a=6378137 +b=6378137
>> +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null
>> +wktext  +no_defs";
>> Proj4js.defs["EPSG:4230"] = "+proj=longlat +ellps=intl +no_defs";
>> ...
>>
>> and it thorughs the error:
>>
>> "ReferenceError: Proj4js is not defined"
>>
>> The object Proj4js is not defined but the proj4.js file gives no error.
>> Am I using a wrong object name for including the defs strings?
>>
>> Cheers,
>>
>> Juan Manuel Moreno Rivera.
>>
>> Sección de Teledetección y SIG / Remote Sensing & GIS group
>>
>> Instituto de Desarrollo Regional / Institute for Regional Development
>>
>> Universidad de Castilla-La Mancha / University of Castilla-La Mancha
>>
>> Tlf: +34 967599200 (Ext: 2623)
>> http://www.teledeteccionysig.es/
>>
>>
>> 2014-02-07 1:35 GMT+01:00 Robert Sanson <Robert.Sanson at asurequality.com>:
>>
>>> Hi Juan
>>>
>>> You are missing the .js file name in the first <script></script> block.
>>>
>>> Here is some code that works for me:
>>>
>>> <script src="lib/proj4js-compressed.js"></script>
>>> <script src="lib/EPSG2193.js"></script>
>>> <script src="lib/EPSG4326.js"></script>
>>> <script src="OpenLayers.js"></script>
>>> <script type="text/javascript">
>>> var xys = map.getLonLatFromViewPortPx(e.xy);
>>>       easting = xys.lon;
>>>       northing = xys.lat;
>>>        var tempgeom = new OpenLayers.Geometry.Point(easting,northing);
>>>       //now re-projection to WGS84
>>>       var src = new OpenLayers.Projection('EPSG:2193');
>>>       var dest = new OpenLayers.Projection('EPSG:4326');
>>>       OpenLayers.Projection.transform(tempgeom, src, dest);
>>>
>>> regards,
>>>
>>> Robert
>>>
>>> >>> "Juanma M. R." <juanma.mr at gmail.com> 7/02/2014 3:23 a.m. >>>
>>> Dear list,
>>>
>>> I am trying to reproject in client side using OpenLAyers but I have
>>> problems to find how to make OpenLayers detecting Proj4js. The proj
>>>
>>> The source code for including OpenLayers and Proj4js is:
>>>
>>> <script TYPE="text/javascript" src="proj4js-2.1.0/dist/"></script>
>>> > <script TYPE="text/javascript"
>>> > src="OpenLayers-2.10/OpenLayers.js"></script>
>>>
>>>
>>> The source code for reprojecting is:
>>>
>>> olb = new OpenLayers.Bounds(b.minx,b.miny,b.maxx,b.maxy);
>>>
>>> var srcprj = new OpenLayers.Projection("EPSG:23030");
>>> >
>>> var destprj = new OpenLayers.Projection("EPSG:900913"); //A definition of
>>> >
>>>
>>> newOlb = olb.transform(srcprj, destprj);
>>>
>>>
>>> The OpenLayers.Projection method creates a Projection object but the proj
>>> instance, the property of Projection type, is null in both cases. So I
>>> imagine it is not capable of creating it. I have the documentation but
>>> maybe I am missing something so obvious ... the final result is that the
>>> coordinates of the new bounds are a copy of the original ones.
>>>
>>> The other question is how to declare the "EPSG:900913". I have included a
>>> file with the Proj4js.defs for each EPSG code to be included but when I
>>> add
>>> the line to include this .js content it teels me that Proj4js is not an
>>> object.
>>>
>>> So, I am doing something wrong integrating the proj4js and OpenLayers.
>>> Could anyone help me? Just pointing to the right docummentation to
>>> configure OpenLayers with Proj4js (I have already tried copying proj4js
>>> in
>>> the same folder as OpenLayers.js but t didn't work).
>>>
>>> Cheers,
>>> Juan Manuel Moreno Rivera.
>>>
>>>
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>>
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