What could a new connection change?

Choose a neighbourhood to examine how an additional entrance or passage could connect a place to everyday facilities. Set two attachment points on the map and compare the existing network with your proposed connection.

Loading the recorded street sections.

Select a street section to set an attachment. Drag to move the map; use + and − to zoom. The fields alongside the map also support keyboard selection.

Recorded networkHypothetical connection

Place 1 · Attachment section 2 · Attachment section Position of attachment 1 Position of attachment 2 Study surroundings Everyday situation

Choose where the connection attaches along each recorded section. 50% is its midpoint; 25% and 75% move the attachment. A straight line is a hypothesis, not an approved passage. Buildings, ownership, heritage protection and actual access must be checked separately.

What changes?

Recalculated angular measures in the fixed study area
Measure	Existing	Variant

Facilities in everyday reach

Mapped facilities reached across the full available network from the same starting point
Walking time window	Existing	Variant

Which sections change most?

Read the comparison correctly

All origin sections and tied shortest angular paths are recalculated in the displayed, fixed circular study area. Integration (NAIN) describes angular accessibility; Choice (NACH) describes the role of a section on those paths. The connecting sections are split identically in both cases. Local values cannot be compared directly with the city-wide colour classes. Routes outside the study boundary do not contribute to these angular values.

Everyday access uses the full available network and the mapped selection of facilities. Standard: 80 m/min. Slower: 60 m/min with a transparent terrain cost multiplier of 1 + min(1, absolute grade / 10). Avoid steps: also exclude mapped steps and sampled grades above 6%. Ground-level heights cannot establish the inclination of bridges, stairs or a building entrance. Missing crossings and entrances remain unknown; no profile certifies accessibility.

Modelled spatial relationships, not measured footfall. Source dates and licences: Street network, Terrain profile. © OpenStreetMap contributors, ODbL. © GeoBasis-DE / LVermGeo ST, DL DE BY 2.0. Hillier, Yang & Turner (2012): NAIN / NACH.