[Geojs-users] transforming geojson with crs EPSG:26986

[David Manthey]

There aren't many predefined tags in proj4, but http://spatialreference.org
lists the transform for many.  For EPSG:26986, you can use "+proj=lcc
+datum=NAD83 +ellps=GRS80 +lat_0=41 +lat_1=42.68333333333333
+lat_2=41.71666666666667 +lon_0=-71.5 +no_defs +units=m +x_0=200000
+y_0=750000".

On Mon, Apr 18, 2016 at 12:53 AM, Aashish Chaudhary <
aashish.chaudhary at kitware.com> wrote:

> 26986 is a local projection (state level). It is possible that proj4 js
> does not have this pre-defined. I believe this demo (
> http://opengeoscience.github.io/geojs/examples/reprojection/) lists all
> the pre-defined ones. The reason you are getting this dataset because its
> fetching from a different server. Let me talk to you in the morning to sort
> this out.
>
> - Aashish
>
>
> On Sat, Apr 16, 2016 at 6:54 PM, Michael Grauer <
> michael.grauer at kitware.com> wrote:
>
>> Hi GeoJs-ers,
>>
>>
>> I'm getting some GeoJson back from a server like the below, but I can't
>> get it to display in GeoJs, using 0.9.0.
>>
>> I've tried transforming it like
>>
>> geo.transform.transformCoordinates('EPSG:26986', 'EPSG:3857',
>> [{x:250428.21609999985,y:921269.2148999982}]);
>>
>> and a few variations, but I'm never getting back what looks like long/lat
>> values, and I get exceptions like
>>
>> colorbrewer.js:312 Can't use transform source: EPSG:26986r @
>>
>>
>> I could grab the LATITUDE/LONGITUDE properties, but these aren't provided
>> for other datasets from the same server of different geometries.
>>
>> Any advice?
>>
>> Thanks,
>> Mike
>>
>>
>> http://spatialreference.org/ref/epsg/26986/
>>
>>
>>
>>
>>
>>
>>
>> {"type":"FeatureCollection","totalFeatures":1,"features":[{"type":"Feature","id":"MORIS.CARCINUS_MAENAS_2010_PT.1","geometry":{"type":"Point","coordinates":[250428.21609999985,921269.
>> 2148999982]},"geometry_name":"SHAPE","properties":{"SITE_NAME":"Beverly
>> Public
>> Pier","TYPE":"dock","CITY":"Beverly","STATE":"MA","LATITUDE":42.54035,"LONGITUDE":-70.8861,"bbox":[250428.21609999985,921269.
>> 2148999982
>> ,250428.21609999985,921269.2148999982]}}],"crs":{"type":"name","properties":{"name":"urn:ogc:def:crs:EPSG::26986"}},"bbox":[250428.2161,921269.2148999979,250428.2161,921269.2148999979]}
>>
>>
>>
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>>
>>
>
>
> --
>
>
>
> *| Aashish Chaudhary | Technical Leader         | Kitware Inc.            *
> *| http://www.kitware.com/company/team/chaudhary.html
> <http://www.kitware.com/company/team/chaudhary.html>*
>
> _______________________________________________
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>
>


-- 
David Manthey
R&D Engineer
Kitware Inc.
(518) 881-4439
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