Njira Zodziwira Kutali mu Maphunziro a Geography
Pendauluan
Kuzindikira kutali ndi ukadaulo womwe umalola kusonkhanitsa deta ndi chidziwitso chokhudza zinthu kapena madera popanda kukhudzana mwachindunji. Njirayi ndi yofunika kwambiri pophunzira za malo chifukwa imalola kusanthula ndi kuyang'anira zochitika zosiyanasiyana zakuthupi ndi zachilengedwe padziko lapansi. Pankhani ya malo, kuzindikira kutali kumapereka chidziwitso chofunikira kwambiri pakumvetsetsa momwe dziko lapansi limagwirira ntchito, momwe nyengo imakhalira, kusintha kwa kagwiritsidwe ntchito ka nthaka, ndi zina zambiri zokhudzana ndi chilengedwe.
Matanthauzidwe ndi Malingaliro Oyambira
Kuzindikira kutali kwenikweni kumaphatikizapo kugwiritsa ntchito ukadaulo wa masensa kuti azindikire ndikuyesa kuwala kwa maginito komwe kumawonetsedwa kapena kutulutsidwa ndi zinthu kapena madera omwe ali padziko lapansi. Deta yomwe imachokera imakonzedwa kuti ipange chidziwitso choyenera. Masensa omwe amagwiritsidwa ntchito amatha kupezeka pamapulatifomu osiyanasiyana, monga ndege, ma satellite, kapena ma drones.
Pali mitundu iwiri ikuluikulu ya deta mu remote sensing: deta ya zithunzi ndi deta yosakhala ya zithunzi. Deta ya zithunzi nthawi zambiri imakhala ndi zithunzi zomwe zajambulidwa mu spectrum yooneka kapena yosaoneka ya electromagnetic, pomwe deta yosakhala ya zithunzi ikhoza kuphatikizapo deta ya radar kapena lidar yomwe siili mu mawonekedwe a zithunzi zooneka.
Mbiri ya Kuzindikira Kutali
Kuzindikira kutali kwasanduka ukadaulo wapamwamba, kuyambira ndi njira zosavuta. Poyamba, kunachitika kudzera mu kujambula zithunzi za mlengalenga pogwiritsa ntchito mabaluni ndi ndege. Zinthu zazikulu zinachitika pamene ma satellite anayamba kugwiritsidwa ntchito m'zaka za m'ma 1960, makamaka pamene NASA inayambitsa ma satellite a Landsat, omwe adapangidwira makamaka kuti azizindikira kutali.
Ndi kupita patsogolo kwa ukadaulo wa makompyuta ndi mapulogalamu osanthula deta, kugwiritsa ntchito njira yowonera kutali tsopano kumapereka mphamvu zowonera zinthu zambiri, zowonera zinthu zambiri, komanso zapamwamba kwambiri. Izi zimathandiza kusanthula mozama komanso molondola zinthu zosiyanasiyana za malo.
Kugwiritsa Ntchito Kuzindikira Kutali mu Geography
1. Kuyang'anira Kusintha kwa Nyengo ndi Nyengo
Kuzindikira kutali kumagwira ntchito yofunika kwambiri pa maphunziro a nyengo ndi nyengo. Ma satellite a nyengo monga Geostationary Operational Environmental Satellite (GOES) amagwiritsidwa ntchito kuyang'anira mlengalenga, kuwona mitambo, ndi kuyeza magawo ena a nyengo. Chidziwitsochi n'chofunikira kwambiri pa kulosera nyengo ndikuwunika kusintha kwa nyengo padziko lonse lapansi , monga kutentha kwa dziko lonse, kusintha kwa mvula, ndi machitidwe a mphepo.
2. Kujambula Mapu a Kagwiritsidwe Ntchito ka Malo ndi Chivundikiro cha Malo
Kuzindikira kutali kumathandiza kwambiri pakusintha momwe nthaka imagwiritsidwira ntchito komanso momwe nthaka imakhudzidwira. Deta yochokera ku zithunzi za satelayiti monga Landsat ndi Sentinel imagwiritsidwa ntchito poyang'anira kudula mitengo, kukula kwa mizinda, ndi kusintha kwa ulimi. Kusanthula kwa nthawi yayitali kumathandiza ofufuza kuwona kusintha pakapita nthawi, kumvetsetsa zomwe zimayambitsa, ndikupanga njira zabwino zoyendetsera nthaka.
3. Kuzindikira Masoka Achilengedwe
Masoka achilengedwe monga zivomerezi , kusefukira kwa madzi, moto wa m'nkhalango, ndi kuphulika kwa mapiri amatha kuzindikirika mwachangu komanso molondola pogwiritsa ntchito ukadaulo wodziwa kutali. Ma satellite a radar monga Synthetic Aperture Radar (SAR) amatha kugwira ntchito nyengo ikavuta komanso usiku, zomwe zimapangitsa kuti azigwiritsidwa ntchito bwino poyang'anira masoka achilengedwe. Chidziwitsochi n'chofunikira kwambiri pakugwirizanitsa mayankho a masoka komanso kukonzekera kuchepetsa zoopsa.
Kuzindikira kutali kumagwiritsidwanso ntchito pofufuza ndi kuyang'anira zachilengedwe, monga madzi, mchere, ndi nkhalango. Ukadaulo uwu umathandiza kuzindikira ndi kuyang'anira malo osungira madzi, kayendedwe ka madzi, ndi ubwino wa madzi molondola kwambiri. Mu gawo la mchere, kuzindikira kutali kumathandiza kupeza miyala yatsopano mwa kusanthula mphamvu yamagetsi yochokera pamwamba pa Dziko Lapansi.
5. Maphunziro a Zachilengedwe ndi Kusunga Zinthu
Akatswiri a za malo amagwiritsa ntchito luso lotha kuzindikira zinthu patali pofufuza za chilengedwe komanso kusunga zachilengedwe. Njira imeneyi imathandiza kuyang'anira malo okhala, kusamuka kwa nyama zakuthengo, komanso momwe zinthu zilili m'chilengedwe. Zithunzi za satellite zimapangitsa kuti zikhale zosavuta kuzindikira madera omwe akuwonongeka ndi chilengedwe komanso omwe akufunikira chitetezo.
Njira ndi Zida Zodziwira Kutali
Njira zosiyanasiyana ndi zida zimagwiritsidwa ntchito pozindikira kutali, imodzi mwa njira zazikulu ndi kusanthula kwa ma spectral, komwe kumagwiritsa ntchito kuwunikira ndi kutulutsa kwa kuwala kwa maginito kuchokera ku zinthu zapamwamba. Zina mwa zida zazikulu ndi izi:
1. Satelayiti Yowoneka
Ma satellite optical monga Landsat, Sentinel, ndi SPOT amagwiritsa ntchito masensa osagwira ntchito omwe amazindikira kuwala komwe kumawonekera kuchokera pamwamba pa Dziko Lapansi. Zithunzizi zingagwiritsidwe ntchito pofufuza zosiyanasiyana, monga mapu a chivundikiro cha nthaka, thanzi la zomera, komanso kuzindikira kusintha kwa zinthu.
2. Rada
Radar imagwiritsa ntchito ma microwave omwe amatha kulowa mu mitambo ndi mvula, zomwe zimapangitsa kuti ikhale yodalirika ngakhale nyengo itakhala yovuta. Ma satellite a SAR monga RADARSAT ndi TerraSAR-X amagwiritsidwa ntchito pojambula mapu a malo, kuyang'anira masoka achilengedwe, komanso kusanthula malo.
3. Lidar
Lidar (Kuzindikira ndi Kuyang'ana Kuwala) imayesa mtunda wa zinthu zomwe zili padziko lapansi pogwiritsa ntchito ma laser. Zida zimenezi nthawi zambiri zimayikidwa pa ndege kapena ma drone ndipo zimagwiritsidwa ntchito popanga mapu a topographic okhala ndi mawonekedwe apamwamba komanso kupanga chitsanzo cha digito.
4. Sensa Yoyang'ana Kwambiri
Masensa a Hyperspectral amajambula zambiri m'magulu ambirimbiri a spectral. Izi zimathandiza kuzindikira ndi kusanthula zinthu zinazake kutengera zizindikiro zawo zapadera za spectral.
Mavuto ndi Mayankho
Ngakhale kuti kuzindikira kutali kuli ndi ubwino wambiri, pali mavuto angapo omwe ayenera kuthetsedwa:
1. Kusasinthika kwa Malo ndi Kwakanthawi
Kusasinthika kwa malo ndi nthawi ya zithunzi kungakhale cholepheretsa pa ntchito zina za malo. Kusasinthika kochepa kungakhale kosakwanira kuti pakhale kusanthula kwatsatanetsatane, pomwe deta yochepa ya nthawi ingayambitse kuchedwa pakuwunika kusintha kwa zinthu.
2. Kusintha kwa Data
Kuchuluka kwa deta yochokera ku remote sensing kumafuna ukatswiri ndi zinthu zina zoti zigwiritsidwe ntchito pofufuza ndi kutanthauzira. Kukonza deta yovuta ya zithunzi kumafuna mapulogalamu apadera komanso makompyuta amphamvu. Njira monga kuphunzira makina ndi cloud computing zikugwiritsidwa ntchito kwambiri pothana ndi mavutowa.
3. Kufikika ndi Mtengo
Kupeza deta yowunikira kutali nthawi zambiri kumakhala kokwera mtengo komanso kochepa, makamaka kwa mayiko omwe akutukuka kumene. Mapulojekiti monga Copernicus wa ku European Union amapereka deta yaulere kuchokera ku ma satellite a Sentinel, koma deta yambiri yamalonda ikulipidwabe.
Tsogolo la Kuzindikira Kutali
Ukadaulo wodziwa kutali ukupitilirabe kupita patsogolo mofulumira. Kupita patsogolo monga ma smallsat ndi CubeSats kumalola kuti ma satellite ambiri ayambe kugwiritsidwa ntchito pamtengo wotsika. Luntha lochita kupanga ndi ukadaulo wophunzirira makina akugwiritsidwa ntchito kwambiri posanthula deta ya zithunzi, zomwe zimathandiza kutanthauzira mwachangu komanso molondola.
Kuphatikiza kwa njira zodziwira kutali ndi Geographic Information Systems (GIS) kukukulirakuliranso, zomwe zimathandiza kusanthula malo ndi kuwonetsa deta m'njira zolumikizirana komanso zosavuta kugwiritsa ntchito.
Mapeto
Kuzindikira kutali kwakhala chida chofunikira kwambiri pa maphunziro a malo. Kuyambira pa mapu a kusintha kwa nyengo mpaka kuzindikira masoka achilengedwe , ukadaulo uwu umathandiza ofufuza ndi opanga zisankho kumvetsetsa zochitika zovuta komanso zochitika padziko lapansi. Ndi chitukuko chopitilira cha ukadaulo ndi njira zowunikira, kuzindikira kutali kukutsimikizika kuti kupitiriza kuchita gawo lofunika kwambiri pa sayansi ya malo ndi kasamalidwe ka chilengedwe mpaka mtsogolo.
