* Lesson data is available to download from: www.dmad.org.tr/qgis2lesson18 *
Hi and welcome to the Lesson 18 in DMAD Marine Mammals Research Association's second free QGIS course. This course if for beginners to intermediates. Interestingly, QGIS is so interested in looking nice that it actually hides some of your data if it overlaps, this can lead to you missing data if you're not careful. In this lesson, we use scale dependent visibility to get round this issue and maintain all our data.