Raws li georeferenced orthophotos nyob rau hauv Google ntiaj teb

Yav tas los nws tau hais txog Yuav ua li cas georeference maps nyob rau hauv Google ntiaj teb, peb yuav tam sim no pom li cas peb ua tib yam nrog tus orthophoto. Nkag siab los ntawm ib qho orthophoto, ib qho duab orthorectified, uas peb paub tias nws qhov kev hloov.

Google ntiaj teb nug plaub daim ntawm cov ntaub ntawv, uas sib tau chaw zov me nyuam ntawm ib sab ntawm lub orthophoto (saib duab hauv qab no), muaj ntau yam ntseeg tus system muaj ib tug paj tau paj ntawm kev ua yuam kev txij li thaum lub orthophotos ntawm ib tug mosaic muaj tsis ib daim phiaj uas nws sawv coincide nrog muaj tseeb sab qaum teb, es lawv yog feem ntawm meridians thiab parallels.
Txawm li cas los tsis muaj kev yuam txog nws, vim hais tias Google ntiaj teb nug txog dab tsi yog cov plaub thaj tsam orthophoto hom latitudes thiab longitudes, yog li no yuav tau mus plaub.

Hauv qhov no peb yuav xav tias peb ua nws hauv Microstation.
Cia peb mam li mus rau kauj ruam yog kauj ruam:

Kom paub cov ntaub ntawv ntawm daim duab

1 Tso cov orthophoto hauv Microstation, vim tias koj qhib ib cov ntaub ntawv, xaiv tus thawj tswj raster / txuas, lov tes taw qhov kev xaiv qhov chaw sib tham sib thiab txais.

2. Yog tias koj tsis pom daim duab, xaiv nws los ntawm tus thawj tswj hwm raster nrog txoj cai nas khawm thiab qhib qhov kev xaiv "haum raster saib"

3. Tam sim no, kom paub cov kev tswj xyuas, qhib cov cuab yeej / toolboxes / xyztext cov cuab yeej thiab siv cov lus txib "label coordinates"

2. Koj xav tau cov kev tswj xyuas ntawm lub hauv paus ntsiab lus ntawm cov kev txwv orthophoto, yog li txoj hauv kev zoo tshaj plaws yog ua cov kab nyob ib puag ncig nws, tam sim no xaiv "label coordinates" cov lus txib thiab nyem rau ntawm lub hauv paus ntsiab lus ntawm cov kab.

4. Nrog rau qhov no koj twb muaj qhov xaj tsawg kawg nkaus, x tshaj plaws, thiab tsawg kawg nkaus, thiab ntau kawg nkaus.

5. Los ntawm txoj kev, export cov duab rau hom ntawv uas Google ntiaj teb txhawb, hauv kuv cov ntaub ntawv nws yog nyob rau hauv .ecw, rau qhov no tsuas yog nyob rau hauv tus thawj tswj raster koj xaiv cov duab nrog txoj cai nas khawm thiab xaiv "txuag li", nyob rau hauv no cov ntaub ntawv kuv yuav export rau .tif hom

Hloov cov UTM ua haujlwm rau Geographic

Txawm tias koj tuaj yeem tau ncaj qha nrog lwm tus chaw ntawm microstation, peb yuav qhia txog qhov theem no ib txwm.

6. Kuv qhov chaw nyob hauv Honduras, kuv lub koom haum muaj raws li nram no: X = 489885.60, Y = 1579986.30 X = 493260.30, Y = 1577678.70

Raws li kuv xav tau los ua kom lawv latitudes thiab longitudes, Kuv yuav siv qhov chaw no txij thaum peb tus phooj ywg Gabriel Ortiz Tau poob nws cov nplooj ntawv. Nyob rau hauv qhov chaw kuv xaiv cov spheroid, hauv kuv cov ntaub ntawv yog Clarke 1866, ces qhov cheeb tsam, uas yog 16, lub qaum teb hemisphere (N) thiab nkag mus rau lub koomhaum.

Vim Google Earth nug txog kuv cov ntaub ntawv nyob rau hauv cov zauv, kuv hloov cov vib nas this los decimal los ntawm faib lawv los ntawm caum, ces tib yam li cov feeb thiab cov nqi. Tib txoj kev ua tiav nrog plaub lub koomhaum, tsis txhob hloov vim qhov kev sib koom tes no yog ib qho zauv thib ob uas txhais tau hais tias yog qhov tseem ceeb. Koj tuaj yeem ua tau qhov no nrog cov khoos kas tshwj xeeb, nws muaj ntau yam tawm los, nws tsis yog lub ntsiab lus ntawm txoj haujlwm.

Muab cov duab xa mus rau Google Earth

7 Qhib Google Lub Ntiaj Teb thiab nrhiav ntau dua los yog tsawg dua hauv lub teb chaws uas muaj orthophoto; Kuv xav tias koj tau kaw Google lub ntiaj teb vim nws siv ntau cov kev pab cuam.

8. Xaiv qhov kev xaiv "Ntxiv duab overlay", koj saib cov duab hauv browser thiab muab nws lub npe muaj txiaj ntsig rau koj lub hom phiaj

9. Hauv qhov kawg ntawm qhov vaj huam sib luag (qhov chaw) Koj nkag mus rau plaub qhov kev sib tw hauv cov zauv ntawm kaum-theem, ua tib zoo tsis txhob lwv cov cim cim.

10. Tam sim no sim zooming nyob rau hauv cheeb tsam, thiab koj mam li pom cov ortho npaj; Ib qho zoo kos npe yog tias lub npov muaj qhov feem ntawm daim duab.

11. Nyob rau hauv ncua sij hawm, saum toj no cov tabs ntawm lub vaj huam sib luag no koj tuaj yeem xaiv tus nqi pob tshab, ces qhov kev xaiv "tau txais" thiab qhov ntawd yog nws.

Nyob rau hauv ib sab tom ntej, peb yuav sim ua tus tig, download tau ib daim duab ntawm Google ntiaj teb thiab tsim georeference. Hmoov zoo thiab koj qhia rau kuv paub yog tias kuv xa koj cov lus tsis muaj tseeb lus :)).