2026 Data (Information)
GRID3 COD - Travel Time Friction Surface v1.0
The dataset consists of two surfaces:
- Walking cost surface: Applies walking speeds across the entire surface, adjusted for slope and elevation.
- Mixed-mode cost surface : Applies motorized speeds on roads and walking speeds in all other areas.
Keywords: Travel time
Geographic Areas
Files
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GRID3 COD - Travel Time Friction Surface v1.0 - Data Release Notes.pdf
application/pdf
214 KB
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GRID3_COD_mix_travel_time_friction_surface_v1.zip
application/zip
1.55 GB
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GRID3_COD_walk_travel_time_friction_surface_v1.zip
application/zip
1.59 GB
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More About This Work
- Academic Units
- Center for Integrated Earth System Information
- Series
- GRID3
- Published Here
- January 14, 2026
Notes
Dataset citation:
Center for Integrated Earth System Information (CIESIN), Columbia University. 2026. GRID3 COD - Travel Time Friction Surface v1.0. New York: GRID3. https://doi.org/10.7916/11yp-gs23 . Accessed [DAY MONTH YEAR].
Data Use Constraints:
Users are free to download, store, access, use, copy, adapt, transform, alter, arrange, build upon, distribute and transmit this work and any derivative works. Attribution of the source must be provided, and further distribution of this work or derived work must maintain the same terms of data use and license as set forth in this Terms of Use.
Copyright 2026. The Trustees of Columbia University in the City of New York.
The data and accompanying document are licensed under a Creative Commons Attribution-Share Alike 4.0 International, CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0) and specified in legal code (https://creativecommons.org/licenses/by-sa/4.0/legalcode).
Contacts and Data Queries:
We appreciate feedback regarding this dataset, including suggestions, discovery of errors, difficulties in using the data, and format preferences. Please contact: CIESIN, info@ciesin.columbia.edu
