I'm wondering whether it's possible to fill only half of a polygon with a color so I can add another layer in which I color the other half and double the amount of information presented.
For a certain area I have 2 datasets. One with plant species seen this year and one with plant species seen 10 years ago. Adding a grid layer and doing a
unique point count vector analysis will give me the amount of species per grid square (from this year, 10 years ago and by subtracting I can see whether the amount increased or decreased).
Now to present this data: Ideally I want to duplicate the layer. In one layer I want to color only the lower-left diagonal half of each polygon, where I present the data from last year. In the other layer I want to fill the top-right diagonal half with a different color, representing the change over 10 years.
A bit like this
My grid squares are 100 by 100 meters. I tried to fill the polygons with only diagonal lines setting the line thickness to half the square as well as the distance between the lines, but that became messy.