Ukuhlola ukunemba kwedatha yokuphakama kwe-Google - Isimanga!

-Google Earth inikeza ukufinyelela idatha kwendawo nge lamahhala le-Google Elevation ukhiye we-API. Civil Site Design, uthatha lolu nebangomuso ukusebenza Satellite yayo entsha Surface. Lo msebenzi uvumela ukuthi ukhethe indawo kanye nebanga eliphakathi kwamaphoyinti wegridi, libuyisela ubuso ngamaphethini wezinga elihlanganiswe ne-software ye-Civil Site Design nesithombe sendawo.

Lance Maidlow of U-ChasmTech LLC wakha leli cala kokusetshenziswa okwakushicilelwe ku Umagazini we-TwinGEO

Ngangilokhu ngifuna ukwazi ngokunemba kwedatha enikeziwe yi-Google. Kwakukhona amacala amabili angasebenzisa engangikucabanga:

• Umklamo womqondo / wokuqala weziqephu ezintsha.
• Ukufinyeleleka kwesimo sezulu sesisitsha sokuhlaziywa kwamagagasi anamanzi nge-HEC-RAS 2

Ngenhloso yokuhlola, ngakhetha amasayithi amabili:

• Isayithi le-1 lalihlukaniswa kakhulu eDunedin, eFlorida. Ngenxa yalokhu, ngase ngilanda futhi ngilungisa ngaphezu kwezigidi ezingu-2 zamaphuzu we-LiDAR kusuka kuwebhusayithi ye-NOAA.
• Isayithi le-2 kwakuyisigatshana esiphakanyisiwe sokuhweba e-Lake County, eFlorida, lapho sathola idatha yokuhlola emgodini we-100, kanye nokuhlola okuningiliziwe kwesikhungo esisekhona.

Umsebenzi i-satellite ukuze ifike, izakhiwo ezikhiqiziwe zezindawo ezimbili zokuhlolwa ezingaphansi kwemizuzu engu-10 ngayinye. Ukuqhamuka okuvela ku-Google elevation data kwakunembile ngokumangalisayo uma kuqhathaniswa ne-LiDAR nedatha yokuhlola.

Noma kunjalo, kuyoba usizo kakhulu uma i-Google inikeza umthombo nosuku lwedatha yakho yokuphakama.

Imiphumela ifana kakhulu, kodwa, amaphuzu e-LiDAR ayengamazinyo aphansi e-8.5 uma kuqhathaniswa nezinga lesazi eyaziwayo. Lokhu kulungiswa kwengezwe kuDatha ye-LiDAR kwi-Civil Site Design ngaphambi kokuba kuqalwe izambatho, njengoba kuboniswe ngezansi ekuqhathaniseni okuningiliziwe kwedatha yomhlaba phakathi kwemithombo emibili. Ubude obuphakathi kwe-1 / 2, i-1 / 3 ne-2 / 3 bufana ngokufanayo. Ukuphakama kwesilinganiso esilinganisiwe yizinyawo ezingu-3 eziphakeme kunezinguquko ze-LiDAR. Lo umehluko kuthiwa yiqiniso lokuthi amaphuzu ayindawo evulekile ezindaweni ezivulekile uma kuqhathaniswa nezindawo ezihlanganiswe nezihlahla. Idatha yesathelayithi yenzelwe igridi ye-20.

Okulandelayo, ukuhlola okubukwayo kwedatha yesathelayithi kuvezwa okuqhathanisa kahle nemibandela yangempela yezwe.

Kulesi simo esithile, i-node kwakufanele ibekwe ekuphakameni kwe-Google, ngokusho ngokunembile nokuma kwemigqa emayelana nemigwaqo ekhona kanye nemibandela yendawo yokuhlala.

Ukuhlukaniswa iziqephu zendawo yokuhweba

Esikhathini esilandelayo sokuhlukaniswa iziqephu zentengiso, le mikhakha yenziwe kusukela kuGrid 20 ene-satellite idatha, ama-red curve atholakala kumininingwane yokuqaphela emgodini we-100.

Ulwazi lwendawo, noma kunjalo, kubalulekile kusukela idatha yokuphakama ayinayo idethi ehlonziwe. Ukucindezeleka kwaqedwa futhi ukubhuka kudalwe ngemuva kokuqoqa idatha ye-Google yokuphakama. Ngokufanayo, echibini lokubamba lakhiwe engxenyeni esenyakatho-mpumalanga yesayithi, ngemuva kokuthi yonke idatha yokuphakama iqoqwe.

Umthombo we-elevation data ye-Google, uhluka ngokuya endaweni yakho. Nakuba ulwazi olungaphezulu mayelana nokuphakama kwe-Google lungatholakala emithonjeni ethile, luhlala luyimfihlakalo.

Nakuba lokhu kuhlaziywa akuyona isayense, kungabonisa ukuthi idatha ye-Google Elevation iyamukeleka futhi ingacatshangelwa ukuklanywa kwemiklamo ye-urbanizations noma ukukhiqiza indawo yokugcina amanzi, engasetshenziselwa ukuhlaziywa kwezikhukhula nezicelo ezifana ne-HEC RAS I-2.