产水量最终结果表格无空值，但栅格图层存在缺失值，是什么原因导致的？
Hello @fan8888 -
Unfortunately I don’t read Chinese, but here is a translator app’s translation of your question:
“There are no null values in the final result table of water production, but there are missing values in the raster layer. What is the reason?”
I’ll answer in English, assuming that you’ll also use a translator app.
First, I’m not sure how to interpret the map. What does “wyield_2000_RasterDomain” indicate? It would be easier to see the null values if you make them a different color.
Do the null values in water yield correspond to null values in any of your input layers? For example, soil data often has pixels with missing data/null values where there are water bodies, glaciers etc. Anywhere there are null values in your input data there will be null values in the output layers.
~ Stacie