Dear FME-users,
I’m creating polygons from input raster data. Therefore I use the transformer “RasterToPolygonCoercer”. The values of 7 input data are written in 1 output feature class.
These attributes includes a lot of “null-values”. (<NULL>)
Do you’ve any ideas which transformer can solve it?
Thank you very much and best regards.
Konrad
Best answer by takashi
In both cases, before merging, the name of attribute that stores the cell value should be renamed appropriately to differentiate the source raster.
Have you looked at the NullAttributeMapper?
It would be helpful if you could give us a concrete example of what doesn't work the way you expect it to.
Have you looked at the NullAttributeMapper?
Do you've an idea how to fill the attribute values of the overlapping polygons?
I've added a screenshot, please take a look in the attachment.
If you need to change all the null values to any specific value, I believe that the NullAttributeMapper transformer is the way to go.
I'm unclear what the "overlapping polygons" means. Could you please elaborate the requirement?
I’ve 7 input data with the same extension. It means that the values are different. Later I want to do queries for point coordinates (x, y). For this I need 7 values and not just 1 and 6 times “Not Null”.
Maybe I can create 7 single output files and set them in relation. But I don’t know how to do this.
I hope my description is understandable. If not I’ll try it again.
Thank you very much. :)
I’ve 7 input data with the same extension. It means that the values are different. Later I want to do queries for point coordinates (x, y). For this I need 7 values and not just 1 and 6 times “Not Null”.
Maybe I can create 7 single output files and set them in relation. But I don’t know how to do this.
I hope my description is understandable. If not I’ll try it again.
Thank you very much. :)
However, I cannot understand why you got null values from raster cells. Every raster cell always has a value, never contains the null. How did you get the nulls?
However, I cannot understand why you got null values from raster cells. Every raster cell always has a value, never contains the null. How did you get the nulls?
I’ve 7 input data with the same extension. It means that the values are different. Later I want to do queries for point coordinates (x, y). For this I need 7 values and not just 1 and 6 times “Not Null”.
Maybe I can create 7 single output files and set them in relation. But I don’t know how to do this.
I hope my description is understandable. If not I’ll try it again.
Thank you very much. :)
Can you show us the screenshot of your Main canvas?
One more question. The RasterToPolygonCoercer creates exactly same shape polygon from the seven source rasters?
In both cases, before merging, the name of attribute that stores the cell value should be renamed appropriately to differentiate the source raster.
In both cases, before merging, the name of attribute that stores the cell value should be renamed appropriately to differentiate the source raster.
