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Overview (English)

Desire Lines is a QGIS plugin for transport demand analysis from an Origin/Destination (OD) matrix. From the matrix and a traffic zone layer it builds the zone centroids, the desire lines and the assigned demand — either on a synthetic neighbourhood network or on the real highway network, with capacity computed by the HCM 6th Edition procedure.

Everything runs inside a single four-tab dialog in QGIS, and each step writes a table into the same output GeoPackage.

The four tabs

  1. Origin/Destination Matrix — imports the OD matrix (CSV) and the traffic zone layer, and generates the centroids.
  2. Desire Lines — draws one straight line per OD pair between centroids, with width proportional to the flow.
  3. AoN (Delaunay) — All-or-Nothing assignment over a synthetic Delaunay network built between the centroids (a topological neighbourhood abstraction, not a real road network).
  4. Highway Assignment (Alocação em rodovias) — capacity by HCM 6th Edition (ch. 15 two-lane, ch. 12 multilane/freeway) and assignment on the real highway network (SNV), by AoN or by MSA/BPR equilibrium.

Requirements and scope of the Highway Assignment tab

This tab needs the GISBR plugin (plugin_dependencies=GisBR), which is what downloads the official Brazilian highway network (SNV/DNIT, INDE). Without GISBR the first three tabs work normally; in this tab the download option is disabled, and you can still use it by pointing to a highway layer already loaded in the project.

Its scope is rural and interurban highways. Urban crossings inside the network are flagged with escopo = 'urbano' and warned about — they are not recomputed with an urban procedure.

Install in three steps

  1. In QGIS, open Plugins → Manage and install plugins and go to Install from ZIP.
  2. Select the downloaded desire_lines-<version>.zip and click Install Plugin; confirm the QGIS security warning with Yes.
  3. Close the plugins window. The plugin shows up in the plugins toolbar and under the Vector → &Desire Lines menu.

Supported QGIS: 3.0 up to the 4.x series (Qt5 and Qt6 builds). GISBR itself requires QGIS 3.16 or newer.

Full documentation is in Portuguese

This page is the whole English documentation. The complete manual — guides for each tab, input formats, output fields, HCM parameters, method choice, troubleshooting and architecture — is written in Brazilian Portuguese: start at Início.