Geobide, ED50 ndi ETRS89 Coordinate System Transformation
Kutenga mwayi kutsata zofunikira za Geobide Suite, tidzawona zosankha zosinthira Zokambirana Zokhudza. Osangalatsa amene ayenera kusandutsa pakati Datum osiyana mu nkhani iyi tiona mmene kuchita ndi ED50 ndi ETRS89 machitidwe pafupifupi nkhani chomwecho mu Latin America pakati NAD27 ndi WGS84.
Kodi deta yasunthidwa?
Izi sizili choncho pa Google Earth, kumene kusintha kwina kumapangidwira, zithunzi zambiri zimachoka kwawo, chinachake chomwe akhoza kuyang'aniranso pofukula pakati pa zosiyana zimatenga; Komabe, m'maiko ambiri, zigawo kapena madera odziyimira pawokha, mabungwe aboma apatsa GoogleEarth zithunzi zawo zodziwika bwino, ndizovuta zomwe GoogleEarth imagwiritsa ntchito WGS84 ngati Datum wamba, kotero kugwiritsa ntchito deta m'dongosolo lina kumafuna kusintha. Kusinthaku kumadalira tanthauzo lake komanso dera lomwe tikupezekamo. Ichi ndichifukwa chake machitidwe abwinobwino samapereka magawo apadera a dera lililonse.
Tenga chitsanzo cha kusintha kwa ED50-30N (EPSG: 23030) kupita ku ETRS89-30N (EPSG: 25830) ya Navarra, ndi Spain. Matanthauzidwe achilengedwe amasinthidwe amakhala ndi mawonekedwe osiyana molingana ndi dera lomwe agwiritsidwa ntchito. Pachifukwa ichi, pali magawo ena owonjezera, omwe samapita mukutanthauzira kwa generic ndipo ku Navarra mwachitsanzo ndi ena koma ku Asturias atha kukhala ndi zina zosiyana.
Ngati tiwona chithunzi pamwambapa chojambulidwa kuchokera ku Geomap, timawona mapu okhala ndi zigawo ziwiri (orthophoto ndi phukusi) zosunthika wina ndi mnzake. Ndizotsatira zakukonzekera Navarra Cadastre mu ED-50N pa ntchentche GoogleMaps mu WGS84 ndipo chokhumudwitsacho chimayenderana ndi vuto lomwe lafotokozedwa m'ndime yapitayi.
Phunziro laposachedwa la Geobide, lomwe tikupanga nkhaniyi tsopano ikufalitsa njira zosachepera 4 kuti zikonzeke ,. Ndi Geobide, tsopano ndizotheka kuwonetsa kutembenuka kwa datum pakusintha pakati pa Coordate Systems m'njira zinayi zosiyanasiyana:
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Generic kusintha:
Njirayi imagwiritsa ntchito kusintha kosasintha popanda malo apakati, ndipo ndizosavuta. Kwa Navarra Mwachitsanzo, kuchoka ku ED50 kupita ku ETRS89 kuli ndi vuto la ~ 100-200m mu x ndi y. (Kukumbukira kuti izi sizimakhudza dongosolo loyenderana ndi dera lofanana).
Ndithu zofanana ndi nkhani ya NAD27 ndi WGS84 kuyenda ndi 202 mamita kumpoto ndi 6 mamita kum'mawa kusintha chapakati malo monga kusintha kumpoto ngakhale tizikumbukira okha kumpoto ikuchokera Ecuador pamene kutalika kumangobwera kuchokera kummawa wonyenga.
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Kusintha Kugwiritsa Ntchito Grid NTv2:
Njirayi imagwiritsira ntchito galasi ndi mfundo zoyenera kutembenuza kutembenuzidwa ndi zilembo zofanana. Njirayi ndi yeniyeni kuposa njira yoyamba ndipo yapangidwa ndi IGN. Zolondola, ndithudi, ngati tili ndi galasi kuntchito yathu.
Kugwiritsa ntchito Geobide Tsopano akupereka ma gridi awiri operekedwa ndi IGN ku Spain, okutira Peninsula ndi zilumba za Balearic, ndipo omwe adasindikizidwa mu 2003 ndi 2009. Wogwiritsa ntchitoyo amatha kusankha gululi mosavuta.
Ma gridi ambiri amatha kupezeka pa intaneti, ngakhale padziko lonse lapansi, koma kukula kwake sikungopezeka kutsitsa kwa Geobide application.
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Kusintha kwa Molodensky (njira ya 3-magawo):
3 imagwiritsa ntchito machitidwe osokonekera pa chiyambi pakati pa ellipsoids. Msewu wokonzedweratu wotchulidwa ndi IGN ku Spain.
Kusintha kwa Bursa-Wolf (njira ya 7-magawo)
Kusintha uku kumagwiritsa ntchito maonekedwe a 7 kusintha pakati pa ellipsoids. Zomwe mungalowemo ndi: Offset (Dx, Dy, Dz), Rotation (Rx, Ry, Rz) ndi Factaling Scoring (μ)
Muzochita Geobide Othandiza a 3 akukonzekera kale IGN kwa Northwest, Central Zone ndi East of the Peninsula, motero.
Zotsatira
Pamene mukutha kuona zotsatira sizikusiyana pakati pa njira zatsopano za 3, koma inde ndi yoyamba. Ndicho chifukwa chake muyenera kudziwa ngati kusinthika kumafuna njira iliyonse yapamwamba.
Pakati pa ED50-xxN (EPSG: 230xx) machitidwe ndi ETRS89-xxN (EPSG: 258xx) m'dera la Spain chiyenera kugwiritsidwa ntchito monga Datums / ellipsoids ED50 ndi ETRS89 / WGS84 sali ofanana.
Mwachitsanzo, ngati Geomap si awa deta patsogolo akonzedwa, kafukufuku Navarra mu ED50-30N (EPSG: 23030) reprojected pa ntchentche pa deta kuperekedwa ndi Google Maps (ellipsoid WGS84) Kodi anagwidwa. Kuti iwo awoneke bwino, m'pofunika kugwiritsa ntchito kusintha kwakukulu komwe kwafotokozedwa kale.
Zikuwoneka bwino kuti Geobide amachita khama kwambiri osati kungosiya mphamvu zake, komanso kulembetsa mwatsatanetsatane funso ili popeza lingakhudze kwambiri khalidwe ndi leniyeni la ntchito, osati kungomvetsetsanso ndi khama lina.
Padakali izi zonse Integrated basi mu injini, koma ngati ife ndemanga abwenzi a Geobide, zofuna wosuta kuwatsogolera kusiya kuonekera ofunsira wosuta kukhala mosazindikira ndipo ngakhale kusintha yakhazikika, kapena yikani china kuntchito yanu.
Kusintha kwa ellipsoidal / geoidal high
M'mawu atsopanowo, ellipsoidal / geoid kutalika kwa kusiyana kowerengera bokosi inasinthidwanso kotero kuti wosuta akhoza kusankha tsopano geoid chitsanzo kuti agwiritsidwe ntchito.
PRJ Ikani Maina Zina
Ndipo potsiriza, kusintha kwina kumene kumawoneka bwino mwa inu khama la kuyanjana ndi miyezo ya OGC kapena machitidwe a anthu ambiri. Pulogalamu ya PRJ yomwe Geobide amapanga ili m'ndandanda wa OGC WKT, yomwe ndi yovomerezeka ndi zida zambiri za CAD / GIS. Osati pazochita za ESRI, zomwe PRJ, ngakhale ziri ndi malingaliro ofanana a masamu monga momwe zimakhalira, zimaphatikizapo Njira Zogwirizanitsa mosiyana.
Mwachitsanzo:
Mu nkhani za wapamwamba PRJ OGC, dongosolo ETRS89-30N (EPSG: 25830) limanenedwa ndi codename "ETRS89 / UTM zone 30N"; ntchito ESRI, m'malo mwake, amachitcha "ETRS_1989_UTM_Zone_30N". Ngati timacheza ndi PRJs zigawo mu nomenclatures awiri ArcGis pulogalamuyo amachita okhudza malo processing ngakhale tanthauzo masamu wa ntchito machitidwe ndi zofanana.
Kumvetsera izi kusamvera, Geobide yathandiza kuti pakhale njira yatsopano muzokonzedwe kawotcheru kotero wogwiritsa ntchito akhoza kusonyeza ngati akufuna dongosolo la Coordinate ndi PRJ mu kalembedwe ka EPSG ESRI.
