I'm running into problems trying to calculate shortest distance from point (smaller black dots below in image) to a port (tagged MANAUS below). Im using hte QNEAT3 OD-matrix tool (from layers as lines). Networks are the roads (red-ish) also depicted below in image.
Two of the input parameters return no value, it doesnt look like it is because they are not located "near" a road as other input parameters located further away dont have the same problem. I also tried the from points as .csv option with no difference in outcome.
Does anyone know what the problem might be?
(im doing this for a large dataset (5700 origin locations to 9 destination locations, and so need it to function allright. this is just a test to see how the model runs... )
CLARIFICATION: This is one of the output attribute tables i get from the computation. For many of the OD's i get no value in return (empty cells, eg fid 8 and 9), suggesting that there would be no network connection, which is not true: