Free GIS nsanja, n'chifukwa chiyani anthu ambiri?

Ndikusiya malo osatseguka kuti ndiwonetsetse; mpata wowerenga ma blogs ndi waufupi, kotero ndikuchenjeza, tifunika kukhala zosavuta.

Tikamakamba za "Zida za GIS zaulere", magulu awiri a asilikali akuwonekera: ambiri omwe amafunsa funsoli
... ndi chiyani?
... ndipo alipo ogwiritsa ntchito iwo?

Ngakhale ochepa ali pambali pa siteji, ali ndi mayankho monga:
... Ndimachita zambiri popanda kugwiritsa ntchito ndalama

Nazi zifukwa zina zomwe zimapangidwira zopanda maonekedwe sizinthu zofanana ndi omwe amagwiritsa ntchito GIS.

1 Maphunziro ophunzirira
Pankhani ya Grass, kuti mupereke chitsanzo, chida ichi chikugwira ntchito ndi Linux ndi Windows, yomwe ili ndi API mu C bwino zolembedwa, chomwe chiri tutorials Okwanira kwathunthu, titatha kuyesa izo timatsimikizira kuti zimagwira ntchito za ARCGis, ndi zowonjezera zambiri zomwe zimapindula zikwi za madola.

... koma ndani amakupatsani maphunziro a GRASS m'dziko la Latin America?

Sindikunena zamaphunziro kwa omwe akutukula, amaphunzira pawokha, popanda ogwiritsa ntchito wamba komanso owerengera malo, kukonza zithunzi, kusintha kwa raster kukhala vector ... zinthu zomwe GRASS imachita bwino kwambiri. Zowonadi kuti kupereka maphunziro a GRASS kuyenera kukhala kosavuta, osachepera maola 24, koma bwalo loipa lomwe silofunikira kwenikweni pamaphunzirowa limatanthauza kuti makampani omwe amaphunzitsidwa samakonza zokambirana pamutuwu. Osanenapo mapulogalamu ena aulere kapena aulere ngati gvSIG, Spring, Saga kapena Jump omwe sadziwa zambiri.

Kotero kuti kujambula kwaphunziro kuli kofala kumapangitsa ogwiritsa ntchito mtengo ... mofanana ndi momwe Linux ilirire, koma ntchito yotchedwa RedHat yomwe imathandizidwa bwino imakhala ndi ndalama zambiri.

2 Ndisavuta kumangopweteka kuposa kuphunzira
Zikuwonekeratu kuti ESRI ndi AutoDesk ndizodziwika chifukwa chakuba awapatsa dzanja ... Ngakhale zili zolimba kwambiri, zida zosiyanasiyana ndipo mosakayikira zimavomerezedwa ndi kampani yotchuka, bizinesi yaying'ono kapena yaying'ono yoperekedwa kumalo ojambula zithunzi iyenera kuyika ndalama zosachepera $ 48,000 zamagetsi muzogulitsa za ESRI kungoyambitsa dipatimenti yachitukuko ya ogwiritsa 5 (ArcGIS , ARCsde, Mkonzi wa ARC, ARC IMS… yopanda GIS Server). Chifukwa chake nsanja zotseguka ndizokopa kwabwino kwa opanga, koma ogwiritsa ntchito wamba pakompyuta azivala chigamba cha diso ndikuwononga $ 1,500 pa intaneti :).

3 Ndi bwino kupita ndi otchuka kwambiri kusiyana ndi zabwino.
Timawona mwambo umenewu ngakhale pogwiritsira ntchito ndalama, wogwiritsa ntchito amadziwa kuti Mac ndi yabwino kuposa PC, kuti Linux ndi yabwino kuposa Windows, kuti zida zina za CAD zili bwino kuposa AutoCAD; kotero nsanja izi zomwe zimapikisana ngati Davide ndi Goliati zimakhalabe m'manja mwa "sankhani ogwiritsa ntchito" omwe amalipira mitengo yofanana.

Ndili mumpikisano pakati pa "pafupifupi mfulu" ndi "zokwera mtengo", khoma limakhala lalikulu, kangapo ndidakhala. atengedwa ndi achimwene, pogwiritsira ntchito zobwezedwa ... ngakhale si zaulere. Chifukwa chake, timagwiritsa ntchito zida zomwe zimawononga $ 4,000 kungokhala ku Geek, ngakhale ogwiritsa ntchito ambiri samalola mapulogalamu, koma makampani.

… Pomaliza, tikuwona kuti ndikofunikira kuti pakhale makampani akulu, omwe amalipiritsa laisensi masauzande ambiri kotero kuti kufunikira kwaukadaulo uku ndikosatha. Ndipo zipitilizabe kukhala choyipa china choyenera, kuti gulu lipitilizabe kumenya nkhondo kuchokera pagulu lotseguka, ngakhale ambiri adzawawona ngati Nerds.