Tshawb nrhiav cov dluab satellite thiab kev tshawb nrhiav cov av siv Landviewer

Thaum nws los tshawb nrhiav cov ntaub ntawv tshwj xeeb (AOI - Thaj Chaw ntawm kev txaus siab) rau cov ntaub ntawv los ntawm cov chaw taws teeb, EOS - Earth Observation System yog ib qho ntawm kev siv web platform tshaj plaws; ob qho tib si tshawb nrhiav, xaiv thiab rub tawm cov duab los ntawm satellite platform. Lub platform no nyuam qhuav sib xyaw qee cov ntaub ntawv ntsig txog cov ntaub ntawv rho tawm, uas tsim nyog tham txog.

Lub ntsiab interface Landviewer yog muaj li ntawm ib tug sab laug vaj huam sib luag, qhov twg tag nrho cov khoom ntawm txhua tus ntawm qhov chaw raws li sensors, uas yog hais txog mus rau lub Aoi, ib tug toolbar nyob rau sab laug bank, uas muaj zog raws li qhia: nqus Aoi (rectangular, polygonal, or circular), ntsuas, txheeb xyuas cov ntawv sau, sau cov txheej, sib koom, lub sijhawm soj ntsuam thiab 3D views. Nyob rau hauv cheeb tsam hauv qab yog qhov teev, qhov chaw khiav dej num ntawm cheeb tsam.

Tam sim no, thaum nrhiav qhov chaw tsim nyog, tus AOI tau txais lub tsev uas tom qab tso cai nkag mus rau lub tsev qiv ntawv khoom muag. Ntxiv rau qhov no, nws yuav tsum raug coj mus rau hauv koj tus account tias ua ntej koj tuaj yeem pom, nrhiav, thiab download tau tej scene, koj yuav tsum sau npe rau nplooj ntawv ua ntej ua tiav cov txheej txheem, txij thaum sau npe nkag rau koj mus rau ib lub sijhawm mus sib hais ntawm 15 hnub nrog cov neeg uas tau txais cov txiaj ntsim kev pab no:

Kev xaiv yooj yim, kev xaiv qis, nruab nrab thiab siab cov duab, siv cov kev sib txuas thiab cov cim indexes, siv cov kev cai indexes, kev nkag mus rau cov ntaub ntawv keeb kwm, ntau qhov chaw ntawm kev txaus siab, thiab WMS cov ntaub ntawv xa mus rau hauv GIS.

Lub platform -uas yog yav tas los dawb- muaj cov txiaj ntsig dav thiab tshiab. Ua ntej koj tuaj yeem rub tawm tsawg kawg 10 satellite khoom los ntawm nplooj ntawv no, tsis muaj kev txwv; tam sim no, nrog cov kev hloov tshiab, nws yog qhov tshwj xeeb me ntsis ntxiv.

Thaum kawm tiav ntawm qhov kev siv ntawm cov Aoi, lawv yeej hais tag nrho scenes txuam nrog cov cheeb tsam no. Lub sab laug pane qhia tag nrho cov platforms uas muaj cov ntaub ntawv nyob rau hauv uas qhov chaw tom qab yuav tsum lim raws li lub hom phiaj ntawm txoj kev tshawb. Satellite platforms uas yuav tau xaiv cov khoom uas: Sentinel-2L1C + 2A, Landsat 8 Oli + TIRs, Landsat 7 ETM +, Landsat 4-5 TM, CBERS-4 MUX, CBERS .4 WFI CBERS-4 PAN5, CBERS 4 -PAN10 thiab NAIP.

Qhov kom zoo dua ntawm kev siv AOI yog tias lub platform yuav tsis qhia cov txiaj ntsig uas tsis sib haum lossis tsis suav txog thaj chaw thaj chaw, txhua qhov kev hloov kho rau nplooj ntawv yog npaj rau thaj tsam ntawm kev txaus siab raug them tag nrho los ntawm cov khoom xaib ntawm cov khoom raug xaiv. Qhov no yog qhov tseem ceeb heev, txij li lwm qhov chaw rub tawm xws li USGS, lossis Alaska SAR Chaw, lawv tso cai rau qhov chaw nyob, tab sis lawv tsis tuaj yeem lav tias qhov taw tes ntawd yog npog tag nrho ntawm qhov chaw. Qhov no pab txo lub sijhawm siv sijhawm los tshawb thiab xaiv cov khoom, thiab tus kws tshuaj xyuas tuaj yeem siv sijhawm ntau dua uantej lossis ua tiav kev ua haujlwm.

Thaum ua hauj lwm nrog AOI, koj yuav tsis muab los yog tso tawm cov duab tsis zoo uas tsis sib npaug los yog them rau qhov chaw uas raug xaiv.

Lwm cov ntxaij lim dej yuav siv tau los ua qhov chaw ntawm cov duab, uas yog, yog tias lawv yog cov hnub tsis hnov ​​nruab hnub, hmo tsis yoojyim sensors, yam sensors, cov ntaub ntawv ncig, EOS cov ntaub ntawv, thiab cov duab siab. . Yog ib qhov tseem ceeb tshaj plaws tshiab sab yog tias lawv pab tus neeg tshawb xyuas los txheeb xyuas cov hnub uas muaj cov khoom muaj feem xyuam rau lawv cov AOI, yav tas los pib thiab xaus hnub thiab muab tso rau txhua qhov sib txawv ntawm scenes.

Thaum koj nyem rau ntawm daim ntawv qhia hnub, koj yuav pom cov hnub tseem ceeb nyob rau hauv xiav, uas tshwm sim thaum muaj scenes muaj, thiab koj yuav tsum saib rau lwm hnub, tab sis, nrog xiav cim, koj muaj peev xwm ua tau tej yam uas hnub muaj scenes.

Txij li lub platform muaj optical dluab thiab cov no muaj ntau dua rau atmospheric yam xws li cloudiness, kuj muaj lim uas pab pov tseg cov dluab uas muaj feem pua ​​siab ntawm huab. Tsis tas li ntawd, nws yog ib qho ua tau kom tau txais cov ntawv ceeb toom txog cov tshiab scenes uas muaj feem rau AOI, los sis yog tias qee qhov kev tshawb nrhiav raug rho tawm, lub kaw lus lossis nco qab thiab xa cov ntawv ceeb toom ntawm cov khoom muag.

Cov ntawv thov cawm tag nrho cov AOI uas tau tsim, dhau sijhawm, lawv tuaj yeem rub tawm, nrog lwm cov cuab yeej uas tau ntxiv, rho tawm los ntawm AOI kom teeb tsa cov qauv lossis lawb tawm raws li yuav tsum tau ua. Hais txog kev siv cov cim ntsuas, ua ntej hloov kho tshiab, cov duab yuav tsum tau saib, nrog rau kev siv cov ntsiab lus zoo li NDVI lossis NDWI, tam sim no lawv tau ntxiv ntau ntau qhov ntsuas, xws li SAVI, ARVI, EVI, SIPI lossis GCI Grassland Clorophile Index.

Tus neeg siv, nyob ntawm qhov laj thawj ntawm qhov kev kawm, tuaj yeem hloov kho qhov ntsuas, tso lub npe uas nws xav txog, xaiv cov xim palette uas yog cov sawv cev feem ntau rau nws txoj kev kawm -lossis tsim ib qho tshiab-, tau tiav ntau cov chaw, sib sau cov neeg siv rau cov txheej txheem hauv kev yooj yim.

Lwm cov cuab yeej nthuav yog kev tshuaj xyuas, uas tso cai rau koj saib lub sij hawm nyob qhov twg yav dhau los scenes, thiab koj tuaj yeem pom zoo li cas yav dhau los xaiv AOI tau hloov zuj zus. Koj tuaj yeem ua rau pom kev ntawm cov scenes, los yog cov cim qhia tias lub tshuab muab. Lub sijhawm yuav tawm ntawm 1 mus rau 6 lub hlis, los yog los ntawm 1 xyoo mus rau 10 xyoo, yog tias muaj lub sijhawm xav tau, nws tuaj yeem muab tso rau.

Hauv theem tshiab ntawm Landviewer, nws pom tau tias yuav hloov qhov dluab, vim nws paub tias vim yog atmospheric los yog lwm yam yuav ua tau meej heev los yog tsaus heev, uas yog qhov kev ua tau zoo ntxiv lawm. ncab, kom sib npaug ntawm cov histogram, nyob rau hauv cov peaks ntawm qhov tsaus ntuj los yog siab teeb pom kev zoo uas lub scene muaj.

Muaj cov 4 ceev xaiv los hloov cov duab:

• Ncab lub hauv paus histogram,
• ncab histogram tiav cov ntaub ntawv teeb,
• cheeb tsam hauv zos ntawm kev txiav,
• Kev noj zaub txiav ncau (qhov tseeb).

Ntxiv cov saum toj no, koj tuaj yeem:

• Koj ntxiv lub khaubncaws sab nraud povtseg saib los ntawm WMS servers, lub scenes yuav tsum downloaded nrog txiav Aoi, li ntawd, nyob nrog ntawm lub box nrhiav (1) los yog lub teb khoom cheeb tsam ntsuam yog haum yooj yim, koj ua tau saib cov ntawv pov thawj uas tau siv thoob plaws hauv lub txheej txheem ntawm nkag mus rau hauv lub platform (los ntawm daim qauv qhia ntawv, los ntawm MDT av, mus rau lub xeem duab siv).
• Lawv qhia txog kev sib koom tes hauv kev tes hauj lwm, xws li hauv twitter, LinkedIn, Facebook, los ntawm ib qhov txuas (2). Ib yam li, yog muaj kev cuam tshuam rau hauv lub platform, cov pab neeg yuav tau hu rau hauv lub khawm uas nyob hauv sab laug sab laug ntawm qhov screen (3).

Nws yog ib qho tseem ceeb kom pom cov cuab yeej zoo li cov no, pab txhim kho thiab pab txhawb cov ntaub ntawv khaws tseg, thiab kev tsim kho ntawm kev soj ntsuam. Qhov no technology yog raws li nyob rau hauv cov huab cov ntaub ntawv yuav tsum muab cia rau hauv cov huab EOS ib tug ntau ntawm cov khoom thiab ntaub no los ntawm ib lub computer, txhua yam koj yuav tsum xav txog yog hais tias nws yog tsis ib tug dawb platform, nws yog nqi them rau cov kev pabcuam. Peb yuav pom yav tom ntej yog tias hom cuab yeej no, yuav los yog hloov tag nrho cov kev siv GIS thiab PDI (Digital Image Processing), uas tau siv rau cov sij hawm nyuam qhuav xws li ERDAS Imagine lossis ENVI.

Yog tias nkag, sau npe thiab mus xeem 15 hnub xeem, mus rau qhov txuas mus ntxiv no: Tus Kws Ncig Tebchaws-EOS.