[mapserver-users] searching for a solution to render polygons crossing the antimeridan
Lars Lingner
gislars+list at googlemail.com
Wed Sep 3 01:03:11 PDT 2014
Hi Peter,
I could reproduce your findings. Excellent issue report btw. Data-SQL
and mapfile are just working with copy paste :)
Displaying in epsg:4326 is working fine.
I noticed a difference in your epsg code 3785 (in your request URL and
3875 in your wms_srs parameter. But even if I add 3785 to it nothing
changes.
Interisting: When I'm viewing the data in QGIS (postgis layer), with
3785 the geometries have a similar "artistic look".
Best wishes,
Lars
On 01.09.2014 15:49, Peter Freimuth wrote:
> Hi,
>
> i think this problem was solved already thousand times but i could not
> find a solution via google.
>
>
>
> We have polygons in a postgis 2.1 db describing the satellite images
> which sometimes cross the antimeridan. These polygons shall be rendered
> to a map via WMS calls using google Mercator in the map client (or any
> other projection supported by the WMS). The problem is that the polygons
> are drawn incorrect (see attached image which is the outcome of the
> following call
>
> http://db5.devel.intern/cgi-bin/catalog_view.fcgi?SERVICE=WMS&VERSION=1.1.1&REQUEST=getmap&layers=coveragepols_test&bbox=19068286.820724,-2282715.4123002,20749901.442696,-1809417.3332432&srs=epsg:3785&format=image/png&width=800&height=800)
>
>
>
> Any hint on documentation or how to overcome this problem is very welcome!
>
> Kind regards,
>
> Peter
>
>
>
>
>
> These are the details: umn ms 6.4.1
>
> ## layer defintion
>
> LAYER
>
> NAME "coveragepols_test"
>
> TYPE POLYGON
>
> STATUS ON
>
> DEBUG 5
>
> UNITS dd
>
> SIZEUNITS PIXELS
>
> TOLERANCE 3
>
> TOLERANCEUNITS PIXELS
>
> PROCESSING "CLOSE_CONNECTION=DEFER"
>
> CONNECTIONTYPE POSTGIS
>
> CONNECTION"user=… password=…. dbname=… host='localhost' port=5432"
>
> DATA "coverage_poly FROM (SELECT id as image_id, coveragepoly as
> coverage_poly
>
>
> FROM public.view_test
>
> ) foo
> USING UNIQUE image_id USING SRID=4326"
>
> PROJECTION
>
> "init=epsg:4326"
>
> END
>
> METADATA
>
> "ows_title" "Coverage Polygons"
>
> #"ows_extent" "-20037508.34 -20037508.34 20037508.34
> 20037508.34"
>
> "ows_extent" "-180 -89 180 89"
>
> "wms_srs" "EPSG:3875 EPSG:900913 EPSG:4326" #output
>
> END
>
> CLASS
>
> NAME "Coverage Polygons"
>
> #STYLE
>
> # COLOR 231 182 21
>
> #END
>
> STYLE
>
> OUTLINECOLOR 10 255 0
>
> WIDTH 2
>
> END
>
> END
>
> END
>
>
>
>
>
>
>
>
>
> ##used data
>
> CREATE TABLE view_test
>
> (
>
> id bigserial NOT NULL,
>
> catalog_id integer,
>
> dataset_id integer,
>
> image_path character varying(256) NOT NULL,
>
> coveragepoly geometry(MultiPolygon,4326),
>
> CONSTRAINT view_test_pkey PRIMARY KEY (id)
>
> )
>
> WITH (
>
> OIDS=FALSE
>
> );
>
> ALTER TABLE view_test
>
> OWNER TO searchdb_admin;
>
>
>
> INSERT INTO public.view_test (catalog_id,dataset_id,image_path,coveragepoly)
>
> VALUES (15829509, 2061925, '',
> st_multi(st_geomfromtext('POLYGON((180.655999799
> -15.8486300543,180.606999598 -16.0696710923,180.558000402
> -16.2907050895,180.509000201 -16.5117270167,180.459000201
> -16.7327328505,180.41 -16.9537185677,180.36 -17.1746801448,180.310999799
> -17.3956135586,180.260999799 -17.6165178033,180.210999799
> -17.8373888554,180.160999799 -18.0582267149,180.110999799
> -18.2790293703,180.06 -18.4997958157,180.01 -18.7205260511,179.991351841
> -18.8027016697,180.235999799 -18.8380677932,180.478000402
> -18.8720267552,180.716999598 -18.9047223899,180.735999799
> -18.8224783746,180.785 -18.6015670891,180.834000201
> -18.3806216053,180.883000402 -18.1596439348,180.931999598
> -17.9386350835,180.980999799 -17.7175950513,181.03
> -17.4965258499,181.079000201 -17.2754304969,181.128000402
> -17.054309998,181.175999799 -16.8331663649,181.225
> -16.6120056327,181.273000402 -16.3908308187,181.321999598
> -16.1696449407,181.37 -15.9484540334,181.134000201
> -15.9164302957,180.896999598 -15.8832025749,180.655999799
> -15.8486300543))',4326)));
>
> INSERT INTO public.view_test (catalog_id,dataset_id,image_path,coveragepoly)
>
> VALUES (15836184, 2063096, '',
> st_multi(st_geomfromtext('POLYGON((179.545984711
> -15.9171514786,179.495243412 -16.1403429893,179.444430698
> -16.3635103601,179.39354657 -16.5866535908,179.342587005
> -16.8097726816,179.291548984 -17.0328726614,179.240427479
> -17.2559535305,179.189217461 -17.4790142828,179.137916918
> -17.7020488835,179.086521827 -17.9250553209,179.035031181
> -18.1480315832,178.983387648 -18.3712140414,179.243388654
> -18.4105864011,179.497604104 -18.4480185073,179.746907061
> -18.4837567894,179.797483404 -18.2603590827,179.847922953
> -18.0371695836,179.898278012 -17.8139509153,179.948551599
> -17.5907060954,179.998746731 -17.3674381412,180.049000201
> -17.1441520821,180.099000201 -16.9208519413,180.149000201
> -16.6975347013,180.199000201 -16.4741983504,180.249000201
> -16.2508398713,180.298000402 -16.0274612754,180.053000402
> -15.9924049487,179.802257091 -15.9557151479,179.545984711
> -15.9171514786))',4326)));
>
> INSERT INTO public.view_test (catalog_id,dataset_id,image_path,coveragepoly)
>
> VALUES (17349264, 2322838, '',
> st_multi(st_geomfromtext('POLYGON((179.512290179
> 72.1542419267,179.144996874 71.9140629718,178.786510145
> 71.6732398732,178.436519681 71.431805025,178.09473374
> 71.1897945653,177.760579284 70.9470277758,178.409691839
> 70.8557411573,179.049974648 70.7633884077,179.683210657
> 70.6697257057,180.037 70.9090975825,180.398 71.1476343103,180.768
> 71.3855111027,181.146 71.6226895184,181.534 71.8591349187,180.869
> 71.9588213447,180.196 72.0571058194,179.512290179 72.1542419267))',4326)));
>
> INSERT INTO public.view_test (catalog_id,dataset_id,image_path,coveragepoly)
>
> VALUES (17068914, 2257845, '',
> st_multi(st_geomfromtext('POLYGON((179.039884317
> 66.7567958853,178.848036178 66.5444771894,178.659274879
> 66.3319824792,178.473510114 66.1193169453,178.290653052
> 65.9064856728,178.110617892 65.6934935118,177.933322353
> 65.4803448547,177.758687153 65.2670434883,177.586635006
> 65.0535926383,177.417090186 64.8399952046,177.249979201
> 64.6262540807,177.085232004 64.4123723214,176.922783052
> 64.1983530566,176.762120618 63.9835922069,176.601173726
> 63.752017263,176.440226834 63.5204423192,176.279279942
> 63.2888673753,176.11833305 63.0572924315,175.957386158
> 62.8257174876,175.796439266 62.5941425438,175.635492375
> 62.3625675999,175.474545483 62.1309926561,175.313598591
> 61.8994177122,175.794181146 61.8349421828,176.269645981
> 61.7699080473,176.741344538 61.7041913201,176.91309487
> 61.9341579796,177.084845202 62.1641246391,177.256595534
> 62.3940912986,177.428345866 62.6240579581,177.600096198
> 62.8540246176,177.77184653 63.0839912771,177.943596862
> 63.3139579366,178.115347194 63.5439245961,178.287097526
> 63.7738912556,178.458501351 63.9870341862,178.631810997
> 64.1994137729,178.807570808 64.4116291457,178.98584849
> 64.6236763672,179.166716008 64.8355512763,179.350248692
> 65.047249762,179.536524184 65.2587677865,179.725621852
> 65.4701011843,179.917623217 65.6812454324,180.113 65.8921955223,180.311
> 66.1029459981,180.512 66.3134910974,180.716 66.5238248589,180.164
> 66.6023721443,179.605404276 66.6799870814,179.039884317
> 66.7567958853))',4326)));
>
>
>
>
>
> INSERT INTO public.view_test (catalog_id,dataset_id,image_path,coveragepoly)
>
> VALUES (15836249, 2063096,
> '/BrowseUDM/ams/2014/3/21/1395403157193100/324329_131001_browse.jpg',
> st_multi(st_geomfromtext('POLYGON((179.838948 -17.340608,179.835209
> -17.557215,180.06104 -17.5607,180.064513 -17.344047,179.838948
> -17.340608))',4326)));
>
> INSERT INTO public.view_test (catalog_id,dataset_id,image_path,coveragepoly)
>
> VALUES (15836252, 2063096,
> '/BrowseUDM/ams/2014/3/21/1395403157193100/324329_6031228_browse.jpg',
> st_multi(st_geomfromtext('POLYGON((179.928689 -16.910725,179.932063
> -17.127389,180.157366 -17.123996,180.153734 -16.907378,179.928689
> -16.910725))',4326)));
>
> INSERT INTO public.view_test (catalog_id,dataset_id,image_path,coveragepoly)
>
> VALUES (15836230, 2063096,
> '/BrowseUDM/ams/2014/3/21/1395403157193100/324329_6031528_browse.jpg',
> st_multi(st_geomfromtext('POLYGON((179.918861 -16.260704,179.922088
> -16.477383,180.146628 -16.474126,180.143154 -16.257492,179.918861
> -16.260704))',4326)));
>
>
>
>
>
>
>
>
>
>
>
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>
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