Step 4: Calculate density of high fire

A - Add Reproject layer algorithm, rename it: “Reproject layer admin”

• Input layer: Count from algorithm “Count point in polygon low fire”
• Target CRS: EPSG: 3857 - WGS 84 / Pseudo-Mercator

B - Add Field Calculator algorithm, rename it: “Field Calculator admin”

• Input layer: Reprojected from algorithm “Reproject layer admin”
• Field name: h_fire_density
• Type: Decimal
• Length: 30
• Precision: 10
• Expression: “nb_high_fire” / $area
• Output: fire_admin_density

C - Manage dependencies

• “Reproject layer admin” depend of “Count point in polygon low fire”
• “Field Calculator h_fire_density admin” depend of “Reproject layer admin”

D - Understand density value

• Depending on the Project properties you have, the function $area will calculate area in m² or km², or other units.

E - Run the model to test results consistency.

F - Save as you model, in case further developments break its execution. It will help you to get back on a solid base, if you mess up the processing.

Model output: Model_on_fire_v2.4.model3