Tsarin gargajiya na al'ada vrs. LiDAR. Daidai, lokaci da kuma halin kaka.

Yin aiki tare da LiDAR zai iya zama mafi dacewa fiye da yadda ake amfani da su? Idan ta rage sau, a wace kashi? Nawa ne zai rage farashin?

Lallai zamani ya canza. Na tuna lokacin da Felipe, wani mai binciken da ya yi min aikin, zai zo da takaddun shafi 25 na sassan giciye don samar da taswirar kwane-kwane. Ban rayu lokacin fassarar akan takarda ba amma na tuna yin shi tare da AutoCAD ba tare da amfani da Softdesk ba tukuna. Don haka na yi hulɗa tare da Excel don sanin ta yaya nisan da za a ɗaga tsakanin tsaunuka biyu, kuma an sanya waɗannan maki a kan yadudduka na launuka da matakan daban-daban, don haɗa su a ƙarshe tare da polylines da na juya zuwa masu lankwasa.

Duk da yake aikin majalisar minista ya kasance mahaukaci, ba a kwatanta shi da filin da yake fasaha, idan kuna son samun wadatattun bayanai don yin samfuran karɓa lokacin da altimetry ɗin ba shi da tsari. Daga nan sai SoftDesk, wanda ya gabata na AutoCAD Civil3D wanda ya sauƙaƙa majalisar minista ya zo kuma Felipe yana ɗaya daga cikin kwasa-kwasan da nake koyon amfani da jimillar tashar, wanda ya rage lokaci, ya ƙara ƙarar maki da kuma madaidaici.

Matsayin drones don amfani da jama'a karya sabbin abubuwa, a karkashin irin wannan dabarar: Juriya don canzawa a dabarun binciken koyaushe yana neman ragin farashi da kuma tabbatar da daidaito. Don haka a cikin wannan labarin zamu bincika zato biyu da muka taɓa ji a wurin:

Magana 1: Yin bincike tare da LiDAR yana rage lokaci da farashi.

Magana 2: Yin bincike tare da LiDAR yana haifar da asarar madaidaici.

A gwajin gwajin

Mujallar POB Tsara aiki wanda aka aiwatar da aiki a cikin binciken data na dodo, ta amfani da hanyar da aka saba amfani da ita sama da kilomita 40. Na dabam, a cikin aiki na biyu 'yan kwanaki bayan haka an inganta ta ta amfani da yanayin LiDAR tare da nisan kilomita 246 na wannan dam din. Kodayake sassan ba daidai suke a tazara ba, an daidaita sashin daidai don yin kwatankwacin yanayin irin wannan.

Matsayi mai launi

An tattara nazarin yanayin wuri a cikin sassan giciye kowane mita 30, wanda yayi daidai da tashoshin da ake dasu. An ɗauki wuraren juyawa a nesa da ƙasa da mita 4.

An tsara aikin tare da maki na cibiyar sadarwar geodetic, waɗanda aka inganta su tare da GPS mai haɗari tare da magi, kuma daga waɗannan an bincika wuraren gicciye ta amfani da haɗin tashar tashoshi mai kama da RTK. Dole ne a ɗauki ƙarin maki a gangaren musamman da wuraren canza fasali don tabbatar da daidaituwar ƙirar dijital.

Sauran bambanci tsakanin maki da aka sani da kuma bayanan da GPS ta samu sune wadanda aka nuna a teburin, mai gaskantawa wannan tsawaitaccen al'ada yana da cikakke daidai.

A binciken LiDAR

Anyi wannan tare da Autasa mai cin gashin kansa mai hawa a tsawan mita 965, tare da nauyin maki 17.59 a kowane murabba'in mita. Sun dawo da wuraren sarrafawa sanannu 26 kuma sun tsallaka da su akan ƙarin maki 11 na farko waɗanda aka karanta tare da yanayin GPS.

Tare da waɗannan maki 37 aka yi dace da bayanan LiDAR. Kodayake bai zama dole ba tunda haɗin da UAV ya ɗauka wanda ke sanye da mai karɓar GPS kuma ake sarrafa shi ta tashoshin tushe, ana samun duk lokacin da mafi ƙarancin tauraron dan adam 6 da ake gani da PDOP na ƙasa da 3. Nisan zuwa tashar tushe bai fi girma ba kilomita 20.

Saitin ƙarin wuraren bincike 65 yayi aiki don tabbatar da daidaito na bayanan LiDAR. Game da waɗannan maki, an sami daidaito na gaba masu zuwa:

A cikin birane: 2.99 cm. (Alamomi 9)

A cikin filin buɗewa ko ƙananan ciyawa: 2.99 cm. (Maki 38)

A cikin daji: 2.50 cm. (Maki 3)

A cikin daji ko ciyawa mai tsayi: 2.99 cm. (Maki 6)

Hoton yana nuna bambanci mai yawa tsakanin ma'aunin da aka ɗauka tare da LiDAR a kan giciye sassan da aka nuna a cikin matakai masu launin kore.

Differences a cikin Tsaida

Binciken ya fi ban sha'awa, akasin tunanin da aka yi cewa binciken LiDAR bai kai ga daidaitaccen binciken da aka saba ba. Abubuwan masu zuwa sune dabi'un RMSE (Tushen yana nufin kuskuren murabba'i), wanda shine ma'aunin kuskure tsakanin bayanan da aka kama da wuraren bincike.

Differences a Lokacin

Idan abin da ke cikin sama ya mamaye mu, ga abin da ya faru a cikin rage lokaci a hanyar daidaitawa tsakanin hanyar LiDAR da hanyar gargajiya:

Tarin bayanai a filin tare da LiDAR shine kawai 8%.

• Ayyukan majalisar kawai kawai 27%.
• Summing da sa'o'i filin jirgin + hukuma + Lidar da filin data + hukuma convenicional topography, Lidar ake bukata kawai 19%.

A sakamakon haka, kwanakin 123 na aiki a kowace kilomita na topography na al'ada sun rage zuwa 4 hours kawai a kowace kilomita.

Bugu da ƙari, idan yawancin maki da aka raba tsakanin lokacin da aka yi amfani da shi a tafiyarwa da kuma tsarin ma'aikata, hanyar da aka saba amfani da ita ta samu 13.75 maki a kowace sa'a, a kan 7.7 miliyan maki a kowane awa na LiDAR.

Differences a Lokacin

Kudin waɗannan kayan aikin na zamani, tare da waɗannan na'urori masu auna sigina waɗanda ke ɗaukar adadin maki, yana ba da shawarar cewa aikin dole ne ya zama mafi tsada. Amma a aikace, rage lokutan tattara jama'a da kuma kashe kudi wanda binciken al'ada yake nunawa, Kudin ƙarshe ga abokin ciniki na kilomita 246 ya haifar da LiDAR 71% ƙananan fiye da farashin kusan kilomita 40 tare da zane-zane na al'ada!

Ba abin mamaki ba, amma farashin kilomita mai linzami tare da LiDAR kawai kawai 12% idan aka kwatanta da al'ada.

ƙarshe

Shin yanayin LiDAR yana maye gurbin yanayin gargajiya ne gaba ɗaya? Ba a cikin duka ba, tunda aikin tare da LiDAR koyaushe yana ɗaukar wasu wurare don wuraren kulawa, amma ana iya kammala cewa tare da fa'idodin farashi, ƙimar samfur da lokaci, aikin tare da LiDAR yana haifar da sakamako tare da kusan daidaito iri ɗaya na yanayin. na al'ada.

A koyaushe za a sami fa'ida da rashin fa'ida; madaidaicin yanayin yanayin kasa babu mamaki, amma rikitarwa na neman izini don shigar da kadarorin masu zaman kansu, haɗarin ganowa a wuraren da ba daidai ba, buƙatar gibba ta fuskar ciyawa mai tsayi da cikas… hauka ne. Tabbas, yawaitar murfin gandun daji shima yana kawo rashin ingancin sa game da batun LiDAR, ba irin waɗannan halayen bane daidai yake tsakanin ƙananan ƙananan ayyuka.

A ƙarshe, muna masu farin san yadda fasaha ya ci gaba da har na manyan ayyukan matsayin samarwa, shi wajibi ne a yi wani bude da kuma kasancewa tunanin ficewa ga sabon da m hanyoyin da za a yi topography.