hello
i want to apply a matematical procedure on some images from ENVI in ArcGIS
in fact i calculate a band ratio on aster image and i want to export this image to ArcGIS to use in my processing steps
here i need the exact values of the raster file as i want to classify them and use in my machine learning process not re-sacaled values between 0-255
e.g. if the value in a pixel is 13.15
at least i get the value 13 in arcgis for that pixel in exported map
how can i do this
have any idea dear all
hello solmaz,
if i understand u correctly, u wanna rounding number in ArcGIS attribute table. u can create a new column. then select Field calculator. u will see a radio button that name is Python. u can use this command in here.
round(!FIELDNAME!,N)
!FİELDNAME! ---> the column you want to round.
Best wishes.
Hi,
either you export the data images from ENVI in ESRI Raster:
File > Save As > ArcView Raster
either you export the data images from ENVI in GEOTIFF:
From the menu bar, select File > Save As > Save As (ENVI, NITF, TIFF, DTED).
In this way the original image coding is preserved (i.e. 16 bit).
Cheers.
it seems that I can’t explain myself truly
let me open the subject a little more
I have standard ENVI image files undergone atmospheric correction QUAC... thus the pixel values are in floating point format with decimal place e.g. 37.458
now I want to export this image to ArcGIS for some processing tasks
and I need the exact pixel values as they are in ENVI
but when I export image as geotif or other formats, the DN values exported as integer values without decimal part i.e. just as 37 for the above mentioned DN value
is there any way to do this task?
on the other hand how to save standard ENVI images as an image readable in ArcGIS with pixel values that have decimal places
Have tried in exporting the image in floating point? Another possibility is to remove the decimals in ENVI by multiplying x 1000 for instance. Then in arcgis you can it divide again.
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