QGIS — un instrumento interesante para conceptos de planificación de forestería al nivel local y regional

Casi el 35% de la superficie de Suiza està cubierta por bosques

Como se utilizó QGIS

Dentro del proceso completo de planificación se usó QGIS para las siguientes cuatro tareas:

  • Import of existing data. The data includes geo-referenced background maps (*.tif) along with polygon, line and point shape files. For the forest manager, the visualization of existing thematic data (for example ground- and drinking water resources, nature protection zones) are important for his daily work.
  • Digitizing. The forestry measurements planned by the forest manager had been digitized. The QGIS digitizing tools with the advanced snapping options are very useful and user friendly. The „delimited text“ plugin enabled the import of additional data tables.
  • Analysis. The areas of the different measurement categories had been calculated. Starting from certain line features such as train tracks or roads, corresponding protection forests were determined with the help of a buffer.
  • Print and export. The print composer supported the map layout creation. The map was exported as PDF and image files.
Extract of the forestry measurements map

Extraer el mapa de medición de forestería

Conclusión

QGIS is an interesting tool for small planning offices, such as guaraci, as well as for the forest managers and owners. It can be used in a professional context and the presented output result was appreciated by all parties involved. For the mentioned tasks the present QGIS version 1.4 “Enceladus” offers all necessary GIS tools. The most important qualities of QGIS are the intuitive user interface and the compatibility with different file formats. It is an ideal tool for projects that are on one hand based on existing geographic data and on the other hand require the acquisition of new data. The user-manual is helpful and easy to understand. Both from the technical as well as the financial perspective QGIS is an interesting alternative to other GIS software.

Perspectiva

The core tasks of a forestry planning concept can be worked out with the mentioned basic GIS tools. Guaraci will continue to use QGIS for forestry planning at the forest owner level. Based on the experiences with the presented project, QGIS can also be recommended for forestry concepts at the level of local authorities. Larger, and more complex projects with detailed analysis requirements could be handled by the combination of QGIS with the Postgis spatial database server. New logging zones as well as forest reservates and protection zones can be easily digitized. Hopefully, forest owners and managers will increasingly use the potential of QGIS also for their yearly planning as well as the documentation of their forest activities.

Autor

Raphael Häner

Raphael Häner

This article was contributed in June 2010 by Raphael Häner. He is Dipl. Forst Ing. at ETH Zürich, Switzerland and founded his one-man company guaraci in 2009.