QGIS di sekolah lanjutan --- ruang terbuka hijau di kota pesisir Rada Tilly, Provinsi Chubut, Argentina.

Pengenalan

In our region, Argentinean Patagonia, we have very few references about the application of GIS in High School for the construction of geographical knowledge as a mean to face territorial and environmental issues. The case of the urban green spaces in Rada Tilly coastal town analyzed by QGIS, tends to demonstrate a methodology of an academic exercise that can project, with important reaches, as formative instances related to the geographical reasoning in students of 12th grade of the Abraham Lincoln School.

We started by the observation (inventory), digitizing the cadastral blocks and the green areas (tree´s canopy) using Google Earth satellite images. As a conceptual framework, we lectured about cartographic design, satellite images reading and interpretation, and specially, location analysis to contrast the situation (in m2) of the urban green spaces by inhabitant in Rada Villa coastal town, with values suggested by the World Health Organization, WHO (a minimum of 9 m2 of green areas, by person, in urban areas).

Tentang proyek

Tujuan utama dari pengalaman adalah untuk mengajarkan siswa kelas 12, dalam implementasi SIG sebagai alat untuk mengoptimalkan dan meningkatkan pengelolaan informasi spasial, dan untuk menyediakan dukungan terhadap proses pengambilan keputusan.

Tujuan khusus:

  • Student´s appropriation of a local issue (the Rada Tilly´s green areas related the 9 m2 by inhabitant proposed by WHO) from a geographical perspective through GIS tools.

  • Penggunaan GIS sebagai alat teknis untuk validasi sosio-spasial hipotesis

  • Verifikasi keberlangsungan proses menangkap, memproses, menyimpan, memperbaiki dan mengupdate data spasial menggunakan FOSS QGIS.

Metodologi:

To generate the project we continue the following methodology:

  • Teoritis dan praktikum mengajarkan; terutama tentang penggunaan QGIS dan keuntungan ruang terbuka hijau dan beserta implikasinya.

  • Kartografi modeling, pendefinisian Vektor layer, pengembangan database GIS

  • Pekerjaan lapangan (trees data recoeds dan lokasi GPS)

  • Vector digitizing of urban cadastral blocks and the tree´s canopies, using a Google Earth (GeoEye) image. In order to consider the amount inhabitants by cadastral block, we assigned an average value of 4 inhabitants by plot.

  • Presentasi hasil melalui kartografi tematik.

Tabel atribut "blocks" vektor layer

Tabel atribut "blocks" vektor layer

Kesimpulan

Based in the projection of an average value of 4 inhabitants by cadastral plot, we estimated that the current (2010) urban population Rada Tilly would go up to around 9.600 inhabitants. These people reside in 209 blocks and they represent 157.6 hectares. The average population density would be of 61 inhabitants by hectare.

The total inventoried green areas grow up to 150.736 m2 (15 hectares). Reason why we can consider that the green area by inhabitant in the study area is 15.7 m2 (the WHO suggested value is 9 m2 of green area by inhabitant). This value proves a very favorable situation, as far as the environmental benefits, that trees offer to the inhabitants in this marine coastal town.

Tabel atribut "blocks" vektor layer

Pendistribusian ruang terbuka hijau (hijau) dan kepadatan populasi dari blocks (putih ke coklat) di kota pesisir Rada Tilly, Provinsi Chubut, Argentina.

Although the project was an academic exercise of High School, we deeply value the inventory´s results obtained by QGIS. Students worked with all academic rigor and seriousness, showing appropriation of the thematic (urban green spaces) and also of the tool (QGIS). It was a very enriching experience for them and also for the educational staff involved.

After the project experience we can assure that the FOSS QGIS is an extremely recommendable alternative for capture, processing, storage, analysis, recovery and updating of spatial data, in fast and efficient form. We have such a positive impression of the software that we will start the use of QGIS in our university courses, replacing GIS Proprietary software that we have being using.

Penulis

Artikel ini ditulis pada september 2011 oleh Mauro Novara dan Alberto Vázquez dari Argentina.

Tabel atribut "blocks" vektor layer

Mauro Novara

Mauro Novara is Professor of Territorial Information Systems course. Lecturer and researcher of National University of Patagonia San Juan Bosco, Faculty of Humanities and Social Sciences. Geography Department. Comodoro Rivadavia, Chubut Province, Argentina.

Tabel atribut "blocks" vektor layer

Alberto Vázquez

Prof. Alberto Vázquez is a graduate teaching assistant of Territorial Information Systems course. National University of Patagonia San Juan Bosco, Faculty of Humanities and Social Sciences. Geography Department. Comodoro Rivadavia, Chubut Province, Argentina.