Geodata and statistics / Humanitarian Data Exchange

GRID3 NGA - Travel Time Friction Surface v1.0

The aim of this work is to generate two friction surfaces for modeling physical accessibility: one incorporating walking speed only, and another combining walking and motorized travel speeds. Motorized speeds are applied exclusively on roads that are present and passable by vehicles; in all other areas, walking speeds are used. The GRID3 NGA - Travel Time Friction Surface v1.0 dataset is a spatial data layer in tiff format. The datasets contain 2 layers: ⦁ GRID3_NGA_walk_travel_time_friction_surface_v1_0.tif - Applies walking speeds across the entire surface, adjusted for slope and elevation. …

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Source	Humanitarian Data Exchange
Collection	Geodata and statistics
Kind	Document
Publisher	GRID3
Date	2025-11-06
Type	dataset
Details	hdx package search fq=groups:nga
Found at	https://data.humdata.org/dataset/grid3-nga-travel-time-friction-surface-v1-0
Archived copy	Look it up in the Wayback Machine
Record ID	`hdx-nigeria:1ee2bae6-b339-4aaa-86f6-4817037e3f3a`

Cite this record

GRID3 NGA - Travel Time Friction Surface v1.0. Humanitarian Data Exchange, 2025. Vero Archive, record hdx-nigeria:1ee2bae6-b339-4aaa-86f6-4817037e3f3a.