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Free GIS data: Best sources and how to use them

Blog post from Felt

Post Details
Company
Date Published
Author
Mamata Akella, Head of Cartography
Word Count
1,547
Company Posts That Month
5
Language
English
Hacker News Points
-
Post removed?
No
Summary

Finding reliable GIS data can be challenging due to its fragmented availability across different platforms and formats, but there are numerous free sources for those who know where to look. GIS data, which is essential for creating maps and analyzing spatial relationships, comes in various types, including raster, vector, and tabular forms, each suitable for different applications like flood risk analysis or urban planning. Key sources of free GIS data include government agencies like the USGS, collaborative projects like OpenStreetMap, and academic institutions, offering datasets that vary in terms of licensing, with some requiring attribution or limiting commercial use. Methods of collecting GIS data range from remote sensing, which provides broad and frequent updates via satellites and drones, to more precise ground surveys and LiDAR technology, which offer detailed 3D terrain models. Evaluating GIS data involves considering factors such as quality, resolution, update frequency, and licensing to ensure accurate and compliant usage, and platforms like Felt facilitate the integration, analysis, and sharing of this data to enhance decision-making processes.

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