Orthophotos nyob ntawm lub sijhawm?
Kuv xav tias cov ncauj lus raug nkag siab yooj yim, tab sis hey, qhib peb lub siab thiab xav ib pliag txog kev dag ntxias thiab lus dag ntawm qhov uas tau hais hauv.
Ntawm sablaj Qhov twg 2.0 nyuam qhuav dhau los yog nthuav tawm los ntawm Jeffrey Johnson thiab David Riallant, ob leeg ntawm Xab'Earth; (thawj lub web daim ntawv thov tsim tawm thiab tus kws tshaj lij thib ob hauv photogrammetry), txoj haujlwm ntawm txoj haujlwm uas lawv ua thiab uas lawv tau hais txog ntawm lub caij nplooj zeeg AGU. Muaj tseeb nws ua rau ntau ntawm peb qhov kev xav zoo ib yam li thaum peb yuav tsum tso cov cuab yeej hluav taws xob zoo li no rau cov hybrids thiab tom qab ntawv rau digital digital.
Zoo, cia siv qee lub sijhawm los xyuas seb peb puas tau meej pem dua:
1 Cov txheej txheem: ua kom yooj yim
Feem ntau, cov txheej txheem tshawb nrhiav ua tib yam li ib txwm, sim los daws cov kev txwv ntawm "kev tsim khoom" yav dhau los (vim tias lawv tau siv thev naus laus zis) ... ua kom luv luv ntawm cov sijhawm thiab cov cuab yeej siv "cov ntaub ntawv thev naus laus zis":
Lub dav hlau me me chaw taws teeb-tswj tau qhov hloov dav hlau ya dav hlau ... tsis tas yuav xav txog roj, nqi mus ncig, tsav dav hlau, kev tso cai ya, thiab lwm yam. Nrog txoj kev muaj txoj kev xav yav tas los.
Lub GPS uas muaj peev xwm ntes tau latitude, longitude thiab qhov siab ... yog yuav tsum muaj lub hauv paus tiv thaiv uas kom txhim kho qhov tseeb raug coj "cia ntawm ya"
- Lub koob yees duab digital nrog kev daws teeb meem ntawm ntau lub megapixels los hu ua "kev daws teeb meem" rau qhov uas lwm tus hais txog microns. Nws yog qhov tseeb, tshem tawm cov teeb meem ntawm kev tsim cov kev tshem tawm tsis zoo, tshuaj xyuas lawv mus rau micron thiab cov tshuaj ntsuab ...
Lub khoos phis tawj lub teeb uas muaj peev xwm nyob hauv qhov yooj yim kml koom nrog txoj kev sib koom tes, nrog kev ntes thiab xa nws ntawm SMS mus rau tus tswj hwm thaj av uas ib nrab txiav cov duab raws li qee cov ntsiab lus tswj tawm ntawm thaj chaw lossis cov qauv digital.
Peb muaj kev ua xyem xyav yog tias lawv muaj txoj hauv kev tau txais lub nrawm ntawm lub koob yees duab, qhov tsim nyog ntawm lub dav hlau ntawm lub sijhawm thaum ntes, hu ua alaveo, suab thiab tig tab sis hav ... hloov mus rau cov hauv qab no
2. Qhov zoo: khaws cia rau hauv lub sijhawm thiab cov nqi
Nws yog qhov tseeb, thawj qhov nce yog lub sijhawm, peb paub tias nws yog qhov teeb meem loj ntawm cov txheej txheem ntawm cov pa; tshwj xeeb yog tias nws tau ua tiav los ntawm kev cog lus nrog cov tuam txhab ntiag tug, nyob ntawm thaj chaw uas yuav tau them lossis thaj chaw thaj chaw, qee zaum yuav tsum tau tos lub caij ntuj sov, thiab thaum tsis muaj pa taws ntau los ntawm cov hluav taws ... uas tuaj yeem!.
Lwm qhov kev nce qib yog tias nyob rau hauv txheej txheem kev coj ua nws tsis muaj peev xwm npog cheeb tsam ntawm 5 square km yam tsis muaj kev pheej hmoo nyiaj txiag thiab kev phom sij ntawm kev ua rau tus neeg ruam ntawm koj tus kheej. Vim li no, cov haujlwm no tsuas yog ua tiav los ntawm tsoomfwv cov tuam txhab, cov haujlwm ib ntus lossis cov tuam txhab loj tau mob siab rau qhov teebmeem no.
Hais txog cov nqi, peb paub dab tsi no raug nqi (ntau ntau cov nyiaj), qhov kev pab them qis, qhov ntau dua tus nqi rau ib lub xwmfab. Tsis tas li ntawd, hauv qee lub tebchaws, National Geographic Institutes lossis Lub Chaw Saib Xyuas Kev Nyab Xeeb yuav tsum tso cai rau lub davhlau, yog li koj yuav tsum them nyiaj ntxiv kom thaij 10 daim duab lossis 100,000 thiab qhov tseeb no ntxiv rau cov nqi
Feem ntau, kev cog lus kom xa cov negatives kuj muaj ntxiv kom lawv tom qab lawv muag lawv hauv qab rooj rau cov tuam txhab ntawm cov kev sib tw lossis thaum kawg tus nqi siab tsis zoo mus rau ib lub chaw rau khoom ntawm tag nrho kab laum.
Yog tias peb xav txog tias nyob rau hauv cov hau kev tshiab no koj tuaj yeem ua lub davhlau hauv cov cheeb tsam tshwj xeeb, nrog cov duab tsis xwm yeem thiab tshwj xeeb hauv thaj chaw me me ... tsis tas yuav npaj lub davhlau nrog cov txheej txheem aeronautical, lossis tso cai rau cov duab nyem uas Google qhia dawb ... muaj tseeb Nws yuav pheej yig dua ... tsawg kawg yog lub davhlau vim tias cov txee txheej txheem twb tau yuav luag siv suab.
3 Qhov tsis zoo: kev nplig tsis muaj qhov system
Dab tsi tsis hnov tsw phem hauv txhua qhov no yog txhua tus neeg tsom mus rau cov duab thiab cov txheej txheem digital ntawm kev qhia txog lawv tab sis me ntsis peb pom tias lawv hais txog densifying lub network voos tam sim no lossis ntau qhov tsis sib haum. Nws zoo nkaus li tias lawv tsuas yog tham txog ncab mosaic ntawm cov duab raws li pom cov ntsiab lus, tab sispaub qhov twg?
Qhov no zoo heev, vim hais tias thaj chaw tsis hloov pauv nrog qhov kev saws cov thev naus laus zis tshiab: "ntawm qis geodetic network ntom, qis dua qhov tseeb ntawm cov khoom lag luam orthorectified"Thiab nws tsis yog hais tias tsis muaj daim ntawv tawm tswv yim raws cai rau ib tus txheej txheem zoo li no, txawm hais tias muaj qhov sib txawv ntawm cov nyom tab sis peb tsis pom cov txiaj ntsig ntawm lawv kev npaj txhim kho.
Cov neeg ntawm Pic'Earth, lawv rub cov duab kom lawv yoog raws cov ntaub ntawv hauv Google Earth !!!, peb nkag siab tias rau lub hom phiaj tias cov ntaub ntawv no tsis tawg vim tias yog tias lawv nrhiav tau lawv nyob qhov twg lawv sib haum, lawv tuaj yeem tawm mus raws li 30 meters kev tawm chaw. Qhov teeb meem tom qab ntawd txheeb xyuas qhov tseeb tias txhua yam khoom siv uas cov neeg no tsim, thiab tias lawv tau upload rau Google Earth, muaj qhov tsis txaus ntseeg ntawm lub ntiaj teb nyiam virtual (2.50 metres tus txheeb ze, 30 meters meej, tsis yog qhia tawm thiab tsis tshaj tawm metadata). Thiab nws tsis yog tias txhua yam tsis raug, nws yog txhua txoj txheej txheem txheej txheem uas koj xav kom mus ntxiv yuav tsum muaj kab ke.
4 Qhov dab tuag: Qhov kev hloov pauv noj tawm ntawm kev paub thiab kev npau taws los ntawm neogeographers.
Peb ua siab ncaj, thaum lawv tau hais rau peb tias peb yuav tsis siv cov ntawd
tsom iav nrog qhov tsis zoo ntawm cov duab uas peb ua haujlwm rau lub phaj los hlawv lub orthophoto, peb tsis nyiam vim tias peb ntseeg tias lub khoos phis tawm nrog nws cov qauv kev ua lej tsis muaj cov txheej txheem los cais qhov ntxoov ntxoo los ntawm stains ntawm daim iav. Cov zaj dab neeg zoo ib yam, tam sim no dab tsi tshwm sim yog semi-automation ntawm cov txheej txheem ntes ... ib yam li cov txheej txheem dhau los yuav sib pauv tau zoo rau lub sijhawm.
Lub sijhawm ntawd, peb tau ua qhov nyuaj nrog "kev paub tseeb" ntawm qhov khoom kawg paub tias lawv txuas ntxiv ua qauv ntawm kev muaj tiag. Yog li peb muaj "neogeographers" ntawm ib sab nrog lawv PDA ntawm tes thiab ntawm lwm qhov kawg peb nrog tag nrho cov chaw nres tsheb; nws yog qhov tsim nyog uas peb muaj qhov qhib vim hais tias zam tsis tau peb cov txheej txheem hybrid yuav tsum tau hloov los ntawm cov kev hloov pauv yooj yim, tsuas yog tsis ntev los sis tom qab lawv cov cuab yeej yuav ua tiav siab dua thiab lawv yuav ua rau qhov nyiaj tsawg dua ... thib peb, tsib thiab thib thaj chaw ntawm 2014 Cadastre
Qhov zoo tshaj plaws yog peb lub tsev kawm ntawv tshuaj ntsuam tsis dhau los ua kev siv thev naus laus zis, thiab lawv tsis nres qhov kev qhia cov qauv uas txhawb lawv txoj kev siv. Thaum kawg, lub khob kas fes yuav saj zoo ib yam ... zoo nkaus li daim ntaub paj ntaub.
5. Qhov xaus: Qhov tseeb txhais tau cov ntsiab lus thiab cov no yuav tsum muaj tus qauv
Peb rov qab mus txog dab tsi ua ntej peb hais, qhov tseeb ntawm cov ntaub ntawv txhais tau tias tsis muaj cov ntawv qhia zoo lossis tsis zoo, tsuas yog qhov tseeb. Txoj haujlwm ntawm cov neeg muab cov ntaub ntawv no yog muab cov lus tseeb, nrog rau cov xwm txheej ntawm qhov ua tau, ua siab ntev thiab qhov tseeb. Tus uas tsa tus ciam hais tias "Kuv mus, pom, ntsuas thiab qhov no yog qhov kuv tau txais ... nrog hom no" thaum tus uas muab lub orthophoto hais tias "Kuv ya, lossis tsis ya, Kuv tau thaij duab, Kuv tau tswj cov ntsiab lus thiab qhov no yog dab tsi Kuv tau txais ... nrog hom no ... ".
Orthophotos nyob rau lub sijhawm tiag tiag? nws yog qhov ua tau, thaum kawg tus txheej txheem txhais tau qhov meej ... thiab yog hais tias qhov tseeb yog qhov tseeb ... nws tsis muaj teeb meem thaum lub dav hlau ya mus peb tau ua si hauv tweeter.
