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首页> 外文期刊>Journal of Geographic Information System >The Use of VHSR Imagery for Wildland Fire Prevention: Application to Land-Clearing Management in the South of France
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The Use of VHSR Imagery for Wildland Fire Prevention: Application to Land-Clearing Management in the South of France

机译：VHSR影像在野外防火中的应用：在法国南部的土地清理管理中的应用

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Every year, the French Mediterranean area is subject to wildland fires. The prevention policy promotes the major role of forest layout, for which it is necessary to build appropriate facilities such as reducing ignition and fire propagation risks near the borders of roads and tracks, creating forest tracks to allow firefighters to move safely through the forest during a fire, creating fuel breaks in order to divide up forests and limit the propagation of fire. Land-clearing along a forest track consists in creating discontinuity between the herbaceous stratum and the tree stratum by eliminating the shrubby stratum and cutting tree crowns. It avoids fire propagation by convection, and enables firefighters to deal with the fire in safety. The main difficulty for forest officers is to identify an optimized method to select appropriate tracks to clear, because it is impossible to clear all the tracks each year. Remote sensing tools would seem to be particularly useful for obtaining the best strategic and economic overview of forest tracks at departmental scale. This theme “land-clearing evaluation method” was selected as a target application for the images derived from the new Pleiades sensors: products and services required by end users. The objective of this work is to assess the real potentiality of such Very High Spatial Resolution (VHSR) imagery for land-clearing management. The methodology used consists in image classification and spatial analysis in order to extract land-clearing quality, and also evaluation of land-clearing quality based on field questionnaires validated through interactions with firefighters and rangers. The development of this methodology and its application to QuickBird images-used as Pleiades data simulations-successfully showed that VHSR Imagery is useful for preventing fire risk. It seems to be a good perspective for providing operational mapping services to help land-clearing management.
机译：每年，法国地中海地区都会遭受野火的袭击。预防政策促进了森林布局的主要作用，为此必须建设适当的设施，例如减少道路和铁道边界附近的着火和火势蔓延风险，建立森林小道，以使消防员能够在森林火灾期间安全地穿越森林。火灾，产生燃料中断，以分裂森林并限制火势蔓延。沿森林径的土地清理包括通过消除灌木层和砍伐树冠来在草本层和树层之间产生不连续性。它避免了对流引起的火势蔓延，并使消防员能够安全应对火势。林业官员的主要困难是找到一种优化方法来选择适当的清除途径，因为不可能每年清除所有清除途径。遥感工具对于在部门范围内获得最佳的森林足迹战略和经济概况似乎特别有用。选择主题为“土地清理评估方法”作为新Pleiades传感器得出的图像的目标应用程序：最终用户所需的产品和服务。这项工作的目的是评估这种超高空间分辨率（VHSR）图像在土地清理管理中的真实潜力。所使用的方法包括图像分类和空间分析，以提取土地清理质量，以及基于通过与消防员和护林员互动而验证的现场调查表，评估土地清理质量。这种方法的发展及其在QuickBird图像上的应用（用作Pleiades数据模拟）成功地表明，VHSR Imagery可用于预防火灾风险。提供操作制图服务以帮助土地清理管理似乎是一个很好的观点。

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