dodgr_flowmap: dodgr_flowmap

Description Usage Arguments Note Examples

Description

Map the output of dodgr_flows_aggregate or dodgr_flows_disperse

Usage

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dodgr_flowmap(net, bbox = NULL, linescale = 1)

Arguments

net

A street network with a flow column obtained from dodgr_flows_aggregate or dodgr_flows_disperse

bbox

If given, scale the map to this bbox, otherwise use entire extend of net

linescale

Maximal thickness of plotted lines

Note

net should be first passed through merge_directed_graph prior to plotting, otherwise lines for different directions will be overlaid.

Examples

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graph <- weight_streetnet (hampi)
from <- sample (graph$from_id, size = 10)
to <- sample (graph$to_id, size = 5)
to <- to [!to %in% from]
flows <- matrix (10 * runif (length (from) * length (to)),
                 nrow = length (from))
graph <- dodgr_flows_aggregate (graph, from = from, to = to, flows = flows)
# graph then has an additonal 'flows` column of aggregate flows along all
# edges. These flows are directed, and can be aggregated to equivalent
# undirected flows on an equivalent undirected graph with:
graph_undir <- merge_directed_graph (graph)
## Not run: 
dodgr_flowmap (graph_undir)

## End(Not run)

dodgr documentation built on Jan. 31, 2021, 1:06 a.m.