Asum GIS, na farko ra'ayi

Idan abokan gvSIG Suna kiyaye alkawarinsu, Litinin mai zuwa Yuli 27 za mu sami sigar 1.9 barga. Ya zuwa yanzu gwajin ya kasance mai girma, gwargwadon ƙarar da aka fahimta a cikin rarraba jerin. Yayinda Litinin ta iso, zuwa lokacinda nake fatan samun gamsuwa na taya murna da bin kalmar, bisa laákari da tabbaci na rashin bacci da dole masu haɓaka zasu kawo, bari mu kalli Quantum GIS kamar wannan daga idanun tsuntsaye.

QGIS an haɓaka shi a cikin C ++ ta amfani da Qt toolkit, yana aiki akan Windows, Mac da Linux. Aikin ya tashi a watan Mayu 2002, tare da tallafi ga harsuna 26 kuma lasisin sa shine GPL.

Za mu gwada ma'anar 1.02 wanda ya bar ni sosai gamsu don zama kayan aikin kyauta, ana iya sauke shi daga wannan haɗin kuma wannan shi ne shafi na Qgis.

Yanayin GIS mai yawa

Tsarin gumaka da ƙirar keɓaɓɓe shine mafi kyawun tuba, baya shafar amfani, amma yana shafar ɗanɗanar kamfanoni (sayarwa) yayin miƙa shi. Bayyanar cewa Na soki a baya na gvSIG, saboda a wani lokaci da bayyanar da rashin bambancin kerawa ya sa wani mai sarrafa ya gaya mini "yana kama da shirin tsohon soja, wasu gumakan suna kama da Paintbrush na 8 bits".

Amma a cikin wannan matsakaici, QGIS yana da kyau, koda tare da sauƙaƙe sauƙi za ka iya zaɓar tsakanin 3 daban-daban jigogi na iconography sosai a hankali, kawai ta hanyar wucewa da linzamin kwamfuta a kan batun ya nuna yadda zahirin zai yi kama.

Abubuwa masu ban sha'awa na Quantum GIS

QGIS yana buƙatar Grass don yawancin ayyukan da wannan kayan aikin ya kafa, yana da kyau don ba kwafin ƙoƙari. Lokacin fara QGIS da rashin ganowa an girka shi, yana tayar da faɗakarwa; a wannan yanayin ina yin bita ba tare da na hada da Ciyawar ba. Lokacin da nake son loda bayanan Grass, saboda ba a girka shi ba na rufe aikace-aikacen, don haka ban bada shawarar amfani da shi ba tare da sanya kayan aikin duka ba.

Gajerun hanyoyi, Dokoki da yawa suna da harafin sanya wasiƙa, kamar ana iya ɗaukar aikin kawai ta latsa wannan wasiƙar. Wannan yana da amfani ƙwarai, Na tuna cewa a cikin AutoCAD ya kasance ɗayan mafi kyawun dabaru lokacin da kusan kowane umarni aka yi ta hanyar maballin.

A bayyane, a gefen hagu akwai taswira da ke nuna yankin turawa, tare da aiki tare a cikin waƙoƙin biyu. Yana da amfani ƙwarai, zaku iya zaɓar waɗannen layukan da kuke son gani a cikin bayyani, kuma za'a iya sauke shi azaman taga mai iyo a cikin girman daban.

Firam ɗin gefen, mai kyau ne kawai, zaku iya ja da plugins azaman layuka zuwa gaba, ana iya yin su yana shawagi, kuma tare da maɓallin dama mai sauƙi kunnawa ko kashewa. Hakanan gudanar da faɗin yana da sauƙi don jawowa ba kawai a ɓangaren hagu ba har ma a cikin ƙananan.

Ƙashin ƙasa, yayin nuna teburin sifa, ya bayyana a yankin, amma kuma yana iya yin iyo. Aiki sosai, tare da zaɓuɓɓukan zuƙowa zuwa layuka da aka zaɓa da canjin faɗin shafi tare da sauƙin jan linzamin kwamfuta. Hakanan a cikin ƙananan firam yana da ayyukan bincike da zaɓi, kwatankwacin yadda Manifold GIS yake yi, ban da sandar matsayi mai sauƙi.

Da samuwar wannan dubawa zane ya sa ya fi mai amfani, abin da iframe ne mafi kyau, tuna da ni Microstation, kamar yadda a cikin yanayin, da taga halayen iya tura ba tare da shafi sauran ayyukan.

Bayanan bayanaiYana da kayan yau da kullum na geoprocessing da bincike cewa wani na iya bukatar, a duban farko akwai wasu da ban sha'awa sosai siffofin da cewa fi son a ga a wani lokaci, kamar yadda fTools plugins hada da ƙasa tallan kayan kawa, hydrological da sauransu.

Karin pluginsKamar kowane aikace-aikacen gpl, ribar sa tana cikin abubuwan da al'umma ke yi kadan da kadan (kodayake tare da fa'idar zama ba a Java ba), a tsorace yana kawo abubuwan yau da kullun kuma sun zama 'yan kaɗan amma ba su da sauƙi kamar yadda suke gani: ana iya ɗora su WFS yadudduka, fitarwa zuwa MapServer, kama haɗin kai, ƙara kayan taimako zuwa ra'ayi kamar arewa, sikelin da haƙƙin mallaka, rubutun da aka kayyade ta waƙafi, yana da dxf zuwa shp mai canzawa, kayan haɓakawa zuwa hotunan hoto, gps console, python console, haɗin haɗin kai , da dai sauransu Amma mafi kyawun abu shine zaɓi don ɗora kayan masarufi na Grass waɗanda suke magana daban. Kama da abin da ke faruwa tare da gvSIG da Sextante kodayake girmar Grass abar girmamawa ce, ɗayan tsofaffin kayan aikin GIS.

Abin sha'awa OGR Converter, wanda zai iya maida yadudduka tsakanin daban-daban Formats, kamar SHP, DGN, GPX, GML, CSV, KML, MapInfo da BD sarari via ODBC, MySQL, PostgreSQL, da sauransu.

Daga cikin mafi kyawun: dxf don shp da kml zuwa dxf, na asali amma ba a aiwatar da wasu shirye-shiryen biyan kuɗi ba.

Ayyuka na asaliKamar sauran kayan aikin, zaku iya ƙirƙirar alamun shafi sarari, rukuni na yadudduka, yadudduka suna da mafi ƙarancin kuma iyakar ikon zuƙowa, sauƙi na ƙara tsarin daidaitawa da tsinkaye; idan akwai matakan shp, idan suna da prj, Qgis yana tserar da wannan bayanin. Yawancin matakai sun haɗa da mashaya ci gaba, wanda muke tsammanin yana da kyau ƙwarai.

Yana da matukar ban sha'awa yadda aka daidaita sifofin abubuwan, saboda a cikin rukuni guda akwai shafuka don kaddarorin gabaɗaya, alamomi, metadata, layuka, ayyuka da abubuwan layi; duk abin da za'a iya ajiye shi azaman salo na .qml kuma a ɗora shi don amfani da sauran matakan. Hakanan wannan teburin yana shawagi kuma ana iya daidaita fadinsa da tsayinsa don dandano. Ko da wannan rukunin da sauran ana iya buɗe su azaman aikace-aikace daban.

Har ila yau, da ake kira siffofin cewa ze sauki amma da suka gudanar da wani babban mai amfani, kamar aunawa nisa m, shi nuna a cikin wani tabular panel, ciki har da nesa daga kowane sashi da hankali.

Samun dama da gyaran bayanai

Kuna iya ɗaukar shp vector shp, gml, Mapinfo da ddf data, kodayake bayanai daga wasu tsare-tsaren ana iya jujjuya su ta hanyar mai sauya OGR. Arin matakan vector ta WFS da PostGIS. Mai fansa, yana ba ka damar tantance yanayin haruffa lokacin ɗora layin.

Amma ga layer raster, yana goyon bayan mai yawa, banda WMS. Bugu da kari, ya haɗa da karatun OGC WFS, WCS, CAT, SFS, da kuma GML.

Don ƙirƙirar sabbin matakan vector ana iya yin su ta hanyar fayilolin siffar OGR ko Grass. Ana adana ayyukan azaman XML tare da ƙgs na qgs, inda aka adana tsarin salo na gvSIG.

Dangane da gyaran bayanai, bayanai dalla-dalla kamar tsarin daidaitawa, raka'a, daidaitaccen adadi, mai ba da damar gyaran rubutu, izini ko iyakancewar polygons masu jujjuya wa a cikin tsari iri daya da yanayi na kamawa (iri da haƙuri) ga kowane Layer da ke cikin aikin. Thearshen yana da ban sha'awa, kodayake na yi takaici cewa kawai yana da zaɓi na yanki da na ɓoye. Nace, Grass dole ne ya zama hujja ga wannan.

Na yi ƙoƙari na shirya wani Layer, shigar da wata kalma, amma na tsammanin yana da jinkiri, ba tare da buƙatar ƙara ƙarin zaɓuɓɓuka ba.Yi hakuri na damuwa, shi ne karo na farko na wasa wannan wasa). Zan ganta bayan na loda kayan aikin tace Ciyawar. Hakanan babu alamar waƙa idan da yawa suna yin gyaran layi ɗaya lokaci guda, duk wanda ya fara cemasa yayi nasara. ugh!

Bayanin bayanan bayanai

Don dalilan fitarwa cikin sauri, akwai wani zaɓi don adana ra'ayi azaman hoto, da kuma abin talla don saurin bugawa, amma ba kamar gvSIG ba, ba shi da ikon sarrafa fasalin ArcView; amma mawallafin bugawa wanda a ganina an ɗan ɗauke shi daga gashi, kodayake yana ba da damar ɗora bayanai, tambari, kwalaye da alamu, kuma ana iya ƙirƙirar abubuwa da yawa don aiki, ban sami yadda zan adana su azaman samfura ba; littafin yace mai yiwuwa ne. Ina tsammanin akwai abubuwa mafi kyau a cikin plugins na Grass don waɗannan dalilai.

Quantum gis da ArcGIS

Hakika za mu, bayan duniya ta gaba.