{"id":372,"date":"2019-01-31T15:26:24","date_gmt":"2019-01-31T14:26:24","guid":{"rendered":"http:\/\/giswg.de\/wordpress\/?p=372"},"modified":"2019-04-24T16:44:16","modified_gmt":"2019-04-24T14:44:16","slug":"ntv2-gridfiles-in-postgis","status":"publish","type":"post","link":"https:\/\/giswg.de\/wordpress\/?p=372","title":{"rendered":"NTv2 gridfiles in PostGIS"},"content":{"rendered":"<p>Ausgangslage: ALKIS-Daten in DHDN GK4 (BY), EPSG:31468, eingespielt mit dem ALKIS Import Tool von norBIT (1). Problemstellung: Genaue Transformation nach ETRS89\/UTM32 mit PostGIS <code>ST_Transform<\/code>, beziehungsweise umgekehrt (2).<\/p>\n<p>Die Gitterdatei (gridfile) von (3) kopieren nach <code>C:\\Program Files\\PostgreSQL\\[Versionsnummer]\\share\\contrib\\postgis-2.3\\proj<\/code> (z.B. PostgrSQL 10, Installation von EnterpriseDB, PostGIS mit Application Stack Builder)<\/p>\n<p>Wenn die Gitterdatei kopiert ist muss der posgresql Dienst beendet und neu gestartet werden, vgl (5). Sonst wird die Gitterdatei nicht gefunden.<\/p>\n<p>Geht so (vgl. 4):<br \/>\n<span style=\"color: #ffff99;\"><code language=\"python\" wraplines=\"false\" collapse=\"false\"><br \/>\nselect ogc_fid, flurstueckskennzeichen,<br \/>\nST_AsText(wkb_geometry) as gtxt_gk4,<br \/>\nST_AsText(ST_Transform(wkb_geometry, 25832)) gtxt_utm,<br \/>\nST_Transform(wkb_geometry, 25832) as geom_utm,<br \/>\nST_AsText(ST_SetSRID(ST_Transform(wkb_geometry, '+proj=tmerc +lat_0=0 +lon_0=12 +k=1 +x_0=4500000 + y_0=0 +ellps=bessel +nadgrids=kanu_ntv2_mittelfranken.gsb +units=m +no_defs', '+proj=utm +zone=32 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs'), 25832)) as gtxt_ntv2_mf,<br \/>\nST_SetSRID(ST_Transform(wkb_geometry, '+proj=tmerc +lat_0=0 +lon_0=12 +k=1 +x_0=4500000 + y_0=0 +ellps=bessel +nadgrids=kanu_ntv2_mittelfranken.gsb +units=m +no_defs', '+proj=utm +zone=32 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs'), 25832) as geom_ntv2_mf,<br \/>\nST_AsText(ST_SetSRID(ST_Transform(wkb_geometry, '+proj=tmerc +lat_0=0 +lon_0=12 +k=1 +x_0=4500000 + y_0=0 +ellps=bessel +nadgrids=ntv2_bayern.gsb +units=m +no_defs', '+proj=utm +zone=32 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs'), 25832)) as gtxt_ntv2_by,<br \/>\nST_SetSRID(ST_Transform(wkb_geometry, '+proj=tmerc +lat_0=0 +lon_0=12 +k=1 +x_0=4500000 + y_0=0 +ellps=bessel +nadgrids=ntv2_bayern.gsb +units=m +no_defs', '+proj=utm +zone=32 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs'), 25832) as geom_ntv2_by<br \/>\nfrom ax_flurstueck limit 10<br \/>\n<\/code><\/span><br \/>\nReferenzen:<\/p>\n<ul>\n(1) <a href=\"http:\/\/www.norbit.de\/68\/\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.norbit.de\/68\/<\/a><br \/>\n(2) <a href=\"https:\/\/postgis.net\/docs\/ST_Transform.html \" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/postgis.net\/docs\/ST_Transform.html<\/a><br \/>\n(3) <a href=\"https:\/\/www.ldbv.bayern.de\/vermessung\/utm_umstellung\/trans_geofach.html \" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/www.ldbv.bayern.de\/vermessung\/utm_umstellung\/trans_geofach.html<\/a><br \/>\n(4) <a href=\"https:\/\/gis.stackexchange.com\/questions\/310567\/use-ntv2-grid-files-in-postgis-st-transform\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/gis.stackexchange.com\/questions\/310567\/use-ntv2-grid-files-in-postgis-st-transform<\/a><br \/>\n(5) <a href=\"https:\/\/gis.stackexchange.com\/questions\/13696\/postgis-st-transform-failed-to-load-nad27-83-correction-file-38\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/gis.stackexchange.com\/questions\/13696\/postgis-st-transform-failed-to-load-nad27-83-correction-file-38<\/a><br \/>\n<\/code><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ausgangslage: ALKIS-Daten in DHDN GK4 (BY), EPSG:31468, eingespielt mit dem ALKIS Import Tool von norBIT (1). Problemstellung: Genaue Transformation nach ETRS89\/UTM32 mit PostGIS ST_Transform, beziehungsweise umgekehrt (2). Die Gitterdatei (gridfile) von (3) kopieren nach C:\\Program Files\\PostgreSQL\\[Versionsnummer]\\share\\contrib\\postgis-2.3\\proj (z.B. PostgrSQL 10, Installation von EnterpriseDB, PostGIS mit Application Stack Builder) Wenn die Gitterdatei kopiert ist muss der posgresql [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[26,25],"tags":[],"class_list":["post-372","post","type-post","status-publish","format-standard","hentry","category-koordinatensysteme","category-postgis"],"_links":{"self":[{"href":"https:\/\/giswg.de\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/372"}],"collection":[{"href":"https:\/\/giswg.de\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/giswg.de\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/giswg.de\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/giswg.de\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=372"}],"version-history":[{"count":13,"href":"https:\/\/giswg.de\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/372\/revisions"}],"predecessor-version":[{"id":386,"href":"https:\/\/giswg.de\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/372\/revisions\/386"}],"wp:attachment":[{"href":"https:\/\/giswg.de\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=372"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/giswg.de\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=372"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/giswg.de\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=372"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}