1 Publisher Correction to: Letters in Spatial and Resource Sciences https://doi.org/10.1007/s12076-018-00220-y

Unfortunately, some correction requests of the author were not considered.

In several occurrences, instead of the Greek letter “delta” the Greek letter “gamma” has been typeset.

The publisher regrets this error and apologizes for the inconveniences caused.

The original publication has been updated.