TABLE 1.

Characteristics of the Input Geospatial Datasets, by Data Layer, for Modeling Travel Time and Estimating Accessibility Coverage Among Women Needing Delivery Care in Kigoma Region, Tanzania

	Data Layer
	Land Cover^a	River Network	Road Network^b	Digital Elevation Model	Birth Density Map^c	Health Facility Coordinates
Data format	Raster	Shapefile	Shapefile	Raster	Raster	Shapefile
Year	2010	2015	2015	2000	2012	2016
Source	Regional Centre for Mapping of Resources for Development, NASA SERVIR Global²¹	OpenStreetMap	OpenStreetMap	Shuttle Radar Topography Mission²²	WorldPop²⁹	CDC Kigoma Health Facility Assessment¹⁶
Spatial resolution	30 meter	N/A	N/A	30 meter	100 meter	N/A
Purpose	Provide non-road land feature class (i.e., forestland, grassland, cropland, settlement, wetland)	Provide a layer of physical barrier in addition to wetland	Provide road land feature class (i.e., major roads, major roads crossing residential areas, secondary roads, local roads)	Provide elevation/slope landscape used for travel speed adjustment for walking	Provide estimated distribution count of live births for a specified travel time catchment	Provide locations of assessed coordinates in the analysis

↵^a The 2010 Tanzania land cover scheme I was used to specify non-road land classes.
↵^b Roads are reclassified to reflect the classification scheme used by John Snow, Inc. and Medical Supply Department in the cross-country medical supply route analysis in 2014.¹⁸
↵^c The layer was created using the mapping methodology described by Tatem et al. (2014).⁴⁶