[Qgis-user] Isochrone - problem

[Riccardo D'Alvito]

Hi guys.

I am carrying out a viability analysis in which, starting from a series of points (contained in a layer) and from the city's infrastructure network, I want to draw the isochrones to understand the distance that can be reached in 5 minutes from those points.
Then I want to hypothesize the interruption (and/or slowdown) of some road sections to see how the isochrons change.

I have been advised to use some plugins like ORS Tool (which uses OpenStreetMap and so unfortunatelly I cannot assume the interruption of the road section), Hqgis (which I don't know how to use) and QNEAT3.
In QNEAT3 I'm able to insert the points layer and the road network layer but it says:
"The TIN-Interpolation algorithm in QGIS is designed to work with projected coordinate systems.Please use a projected coordinate system (eg. UTM zones) instead of geographic coordinate systems (eg. WGS84)!"
The problem is that my layers are in a projected coordinate system.

Do you know what can I do? Or if you know other ways to do isochrons with regular viability and assuming the interruption or slowdown of some road?

Thank you so much,

Riccardo
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