why the "Raster to polygon" tool takes only the fields that contain real numbers?

[JamalNUMAN]

sorry for the mistake in the title of this post. it should be: why the "Raster to polygon" tool takes only the fields that contain integer numbers?

Does the tool "Raster to polygon" take only the fields that contain only integer number?

please, see the attached image that shows my question


why the "Raster to polygon" tool takes only the fields that contain real numbers?

what i should do if i have a field that contain Real number?

what's wrong with the real numbers???

than you

regards

Jamal

[PatrickTaurman]

What is the Type for this field?  Is it String, Short, Long, Float, Double?

[JamalNUMAN]

What is the Type for this field?  Is it String, Short, Long, Float, Double?

it is double.

[PatrickTaurman]

Don't know why I asked if it was short or long, because you obviously have decimals in there. 

As for why it doesn't work, when I asked early looked at the wrong Help.  I accidentally looked up the help for polygon to raster, which will use float or integer.

Raster to Polygon only uses integer or string.

raster_field (Optional)

The field used to assign values from the cells in the input raster to the polygons in the output dataset.

It can be an integer or a string field.

http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//001200000008000000.htm

[JamalNUMAN]

Don't know why I asked if it was short or long, because you obviously have decimals in there. 

As for why it doesn't work, when I asked early looked at the wrong Help.  I accidentally looked up the help for polygon to raster, which will use float or integer.

Raster to Polygon only uses integer or string.

raster_field (Optional)

The field used to assign values from the cells in the input raster to the polygons in the output dataset.

It can be an integer or a string field.

http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//001200000008000000.htm

It is SP2.

I'm not sure also why when we reclassify according the Iprime then the result is irrelevant!!! (attached)

[DanPatterson_Retired]

e input raster can have any cell size and must be a valid integer raster dataset.

from the version 10 help files...check other versions if you aren't using ArcGIS 10

[SteveLynch]

Raster to Polygon only takes integer (or string) - period.

This is by design since 9.0

The reason is that too many individual polygons will be created in most cases.

In the case where one really wants float output, then can multiply the raster by, say 1000, and cast to integer, convert and then divide by 1000. This workflow has been repeated many, many times in this Forum.

Steve

[JamalNUMAN]

Raster to Polygon only takes integer (or string) - period.

This is by design since 9.0

The reason is that too many individual polygons will be created in most cases.

In the case where one really wants float output, then can multiply the raster by, say 1000, and cast to integer, convert and then divide by 1000. This workflow has been repeated many, many times in this Forum.

Steve

Thank you for the answer.

this problem is originated from trying to dissolve the raster (attached image) according the Iprime field.

i was trying to have a dissolved raster with 5 values: 0.2, 0.4, 0.6, 0.8 and 1. but i couldn't find any tool to accomplish this task.

i got a suggestion to convert the raster to polygons then the ploygons to raster to achieve the dissolve!!!!! nevertheless, the problem is again there. i couldn't obtain a dissolved raster with the values   0.2, 0.4, 0.6, 0.8 and 1

basically, how can i dissolve the raster according the Iprime field?

[DanPatterson_Retired]

Try some of the other suggestions then, there have been several others but you appear to be fixed on one, is there a reason?

[JamalNUMAN]

Try some of the other suggestions then, there have been several others but you appear to be fixed on one, is there a reason?

at all. this is the only suggestion that i got.

do you have any?