I am getting some strange spikey artefacts from ContourGenerator. The dataset is a goverment isued DTM, pictured are some sea islands. The data is preprocessed with rastercellrounding and a notatasetter to ensure that the sea surface did not hold any data.
Settings as follows:
First image elev 2.5 tolerance 5
Second image elev 2.5 tolerance 0
Third image is a close up of the the second (elev 2.5 tolerance 0)
Any ideas on how to deal with this?