Définition
Le géoréférencement est le processus qui consiste à aligner l'imagerie satellitaire ou d'autres types de cartes sur les coordonnées géographiques réelles. En d'autres termes, il s'agit de prendre une image de la surface de la Terre et de la placer avec précision sur une carte de la même zone.
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To georeference an image, you need to identify a set of ground control points on the image, which are known locations on the Earth's surface with known geographic coordinates. These ground control points serve as reference points to align the image with the actual geographic coordinates of the area. Once the image is aligned with the geographic coordinates, it can be used to create accurate maps, perform spatial analysis, or combine with other datasets to extract useful information.
Georeferencing is essential—it helps create up-to-date, precise maps and enables thorough spatial analysis. It is a pivotal step in utilizing satellite imagery or map data across various sectors.
Key Benefits and Uses:
- Creating Accurate Maps: Essential for purposes like urban planning, disaster readiness, and environmental auditing.
- Change Detection Over Time: By comparing historical and current georeferenced imagery to pinpoint environmental or urban shifts.
- Spatial Data Integration: Merging maps with demographic stats, climatic conditions, or geological data for enhanced regional insights.
- Natural Resource Management: Enabling the monitoring of forests, agricultural expanses, or hydric zones through dedicated analysis of georeferenced images.
Map providers, like LocationIQ offer access to vector and raster map tiles via API. The vector maps are high resolution, use up low bandwidth and are flexible enough to be used in a variety of implementations. The use of Open Source Mapping data provides an additional layer of flexibility on use of the processed data.
