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I have a raster data of 1992 and a 'shapefile' of Los Angeles county. I want to reclassify the pixel value of the raster data set to 'no data' or zero in the region where the raster and the 'shapefile' overlaps. I'm using ArcGIS 10.1. I tried using spatial analyst tool> 'reclass'. But I'm not getting the desired result.

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I'd try the following methodology to get your result:

  1. Create a new field (NO_DATA) in your vector file ("No Data Layer") for your no data values records, for example "-9999".

  2. Convert your polygon ("No Data Layer") to raster, selecting the same pixel size of the raster data to overlap and the pixel value NO_DATA.

    Link

  3. Mosaic both raster dataset to a new raster, putting your "No Data Layer" on the top of the list and select the option "mosaic_colormap_mode" to FIRST: The pixel value from the first raster dataset in the list will be applied to the output raster mosaic.

    Link

  4. In your new raster, reclasiffy your No data value (for instance, -9999) to "No data"

    Link

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    and the result is i think what i was looking for!!!! – sayan de sarkar Sep 18 '13 at 12:31

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