[mapserver-users] mapserver, msProjectPoint() error

[Jeff McKenna]

Hi Johnson,

Welcome to the MapServer community.

Regarding those errors, here are some rules that I always follow, that 
may help your case:

- when serving through WMS/WFS etc, always make sure to remove all 
errors from a GetCapabilities response first (in your case, there might 
be warnings of missing metadata such as "wfs_srs").

- try not to use a non-standard projection (EPSG:900913 was officially 
replaced by EPSG:3857 https://epsg.io/3857), you're just asking for 
possible trouble down the road if you do...

- just to see if these errors are related to a projection, possibly 
setup a test case where your source data is in 4326, you serve the data 
through WFS in 4326, and your client-side application requests the data 
in 4326 (and see if those errors still exist)

- possibly set the EXTENT values for the map object to the whole world: 
-180 -90 180 90

- test your mapfile locally with the shp2img commandline utility 
(http://mapserver.org/utilities/shp2img.html)

Other notes:

I have seen odd projection errors like yours before, somehow being 
caused in a client-side javascript application requesting WMS/WFS 
layers.  In my case I believe the maps were generated fine, so I might 
have 'lived' with those errors, not sure.

-jeff



-- 
Jeff McKenna
MapServer Consulting and Training Services
http://www.gatewaygeomatics.com/





On 2017-07-10 8:31 PM, Vu, Johnson (EC) wrote:
> Hi,
> 
> I’m a student working on a webapp that uses mapserv 6.4.1. I’ve been 
> getting this error in my ms_error.txt and I’m having trouble finding the 
> cause. At first I thought it was a problem with my extents, so I 
> verified all of them with my .shp files and everything was OK. I am 
> using epsg:4326 as my projection. I’ve bolded the two errors I’ve been 
> seeing the most. They fill the error log when I click on a region on the 
> map.
> 
> Does anyone know possible causes for the error I’ve posted below? I’m 
> very new to mapserv and would appreciate any help.
> 
> wxo_mapserv/tmp_output/ms_error.txt:
> 
> [Mon Jul 10 23:06:29 2017].538763 msProjectPoint(): Projection library 
> error. proj says: latitude or longitude exceeded limits
> 
> [Mon Jul 10 23:06:29 2017].538797 msProjectPoint(): Projection library 
> error. proj says: latitude or longitude exceeded limits
> 
> [Mon Jul 10 23:06:29 2017].538813 msProjectRect(): some points failed to 
> reproject, doing internal sampling.
> 
> [Mon Jul 10 23:06:29 2017].539124 mapserv request processing time 
> (msLoadMap not incl.): 0.352s
> 
> [Mon Jul 10 23:06:29 2017].539162 msFreeMap(): freeing map at 0x2188de0.
> 
> [Mon Jul 10 23:06:35 2017].301195 CGI Request 1 on process 31628
> 
> [Mon Jul 10 23:06:35 2017].302266 msWFSParseRequest(): WFS post request: 
> <GetFeature                        service="WFS"
> 
>                 version="1.1.0"                        
> srsName="EPSG:900913"                        xmlns:topp="http://www.openplan
> 
> s.org/topp"                        
> xmlns:wfs="http://www.opengis.net/wfs"                        
> xmlns:ogc="http://www.opengis.net
> 
> /ogc"                        
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"                        
> xsi:schemaLocation="http
> 
> ://www.opengis.net/wfs                         
> http://schemas.opengis.net/wfs/1.0.0/WFS-basic.xsd">                    
>      <Query
> 
> typeName="clc_he_site_e" 
> srsName="EPSG:900913">                            
> <Filter><Intersects>                                <Pr
> 
> opertyName>the_geom</PropertyName>                                <Point 
> srsName="EPSG:900913">
> 
> <coordinates>-11383613.748454727,6924094.039571445</coordinates>                                
> </Point>
> 
>     </Intersects></Filter>                        
> </Query>                    </GetFeature>
> 
> [Mon Jul 10 23:06:35 2017].303829 msProjectPoint(): Projection library 
> error. proj says: tolerance condition error
> 
> [Mon Jul 10 23:06:35 2017].303882 msProjectPoint(): Projection library 
> error. proj says: tolerance condition error
> 
> [Mon Jul 10 23:06:35 2017].303909 msProjectPoint(): Projection library 
> error. proj says: tolerance condition error
> 
> [Mon Jul 10 23:06:35 2017].303954 msProjectPoint(): Projection library 
> error. proj says: tolerance condition error
> 
> *“msProjectPoint(): Projection library error. proj says: tolerance 
> condition error”                              <- repeats several hundred 
> lines*
> 
> *“msProjectPoint(): Projection library error. proj says: latitude or 
> longitude exceeded limits”     <- repeats several hundred lines*
> 
> Post Request param:
> 
> <?xml version="1.0"encoding="UTF-8"?>||
> 
> <GetFeaturexmlns:ogc="http://www.opengis.net/ogc"xmlns:topp="http://www.openplans.org/topp"xmlns:wfs="http://www.opengis.net/wfs"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"service="WFS"version="1.1.0"srsName="EPSG:900913"xsi:schemaLocation="http://www.opengis.net/wfs                         
> http://schemas.opengis.net/wfs/1.0.0/WFS-basic.xsd 
> <http://www.opengis.net/wfs                        %20http:/schemas.opengis.net/wfs/1.0.0/WFS-basic.xsd>">||
> 
> ||<QuerytypeName="clc_he_site_e"srsName="EPSG:900913">||
> 
> ||<Filter>||
> 
> ||<Intersects>||
> 
> ||<PropertyName>|the_geom|</PropertyName>||
> 
> ||<PointsrsName="EPSG:900913">||
> 
> ||<coordinates>|-11452101.325798245,7031717.375396973|</coordinates>||
> 
> ||</Point>||
> 
> ||</Intersects>||
> 
> ||</Filter>||
> 
> ||</Query>||
> 
> </GetFeature>
> 
> Thanks,
> 
> Johnson
> 
>