Support +title parameter about proj HOT 10 CLOSED

Modified by dgrichard on 13 Oct 2008 21:28 UTC

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Attachment added by dgrichard on 13 Oct 2008 21:26 UTC
https://trac.osgeo.org/proj/attachment/ticket/17/pj_init.diff

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I am updating this as it might still be usefull. If not then it should be closed after 8 years shouldn't it?
Note : The proposed diff doesn't patch anymore on current sources

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There's a lot of open tickets that probably should be closed. I guess we should make an effort to reduce the number of open tickets, since many of them are outdated or already solved. The thing is, it takes a lot of time and is very tedious work...

I can't see the value the +title parameter brings to proj.4. Care to educate me?

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Well, i don't know if +title itself would be usefull, but what could be more important would be that +title is not properly read. So if you have a title which contains spaces, but not in quotes, like in the IGNF file, only the first word will be read as the title, and the rest of the title string could cause parsing errors for the following text

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That seems more like user error to me, to be honest.

How does PROJ4JS use +title? To override the projection title that is already defined in the source?

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What seems a user error? The fact that titles are not in quotes in the file nad/IGNF of proj sources?

I don't know about PROJ4JS actually, but wanting to get a user friendly name for a coordinate system by reading it's title seems like a common action one would want to do using the Proj C API in my opinion

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What seems a user error? The fact that titles are not in quotes in the file nad/IGNF of proj sources?

No, not putting whatever comes after +xxx= in quotes when spaces are needed.

I don't know about PROJ4JS actually, but wanting to get a user friendly name for a coordinate system by reading it's title seems like a common action one would want to do using the Proj C API in my opinion

I agree. In a very roundabout way it is sort of possible with the current API. It is definitely reasonable to make that easier for users of the proj API. I can't really connect the dots between that and this ticket, however.

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A +title tag would be a feature that would make it similar to the "name" parameter for WKT for "Coordinate Transformation Services". The +title is a comment telling GIS users what projection is contained within the projection definition. It might clear up some confusion as to which PROJ.4 projection string the user is using. I've seen discussion about Proj4 projection strings being simpler, but WKT projection string are preferred by some GIS users/programmers because it has the projection's name within it.

@kbevers It is hard to say what the original submitter end goal was of this ticket. It could be as simple as an effort to maintain compatibility with PROJ4JS. Or it could be a more extensive goal to have the +title tag in most proj4 strings including the epsg & IGNF registry files.

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Fixed. Works in master

$ src/cs2cs -v +init=IGNF:RGF93G  +to +title="my foo bar" +proj=lcc +lat_1=1 +lat_2=2
# ---- From Coordinate System ----
+init=IGNF:RGF93G
# ---- To Coordinate System ----
+title=my foo bar +proj=lcc +lat_1=1 +lat_2=2

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