If the image is a 16-bit grayscale image, try converting to 8-bit pixel depth as described above.Check the Symbology tab of the layer Properties and make sure that Stretch Type isn't set to something inappropriate. For the 3-band file, for example, drag the Band you want to keep from the ArcCatalog (right-hand) pane to the Layer (left-hand) pane.If successful, you can then re-export it using a supported format (e.g. If so, re-export it (right-click, Data, Export data) in an uncompressed format in order to view it normally. Check to see if it is in an unexpected compressed format - you will find the Compression Type on the layer Properties.This may happen for several reasons and there are a few things you can try to have it view normally for OCHRE. Which are used to create a raster image windows#Sometimes the image will show up black in ArcMap, in OCHRE and in the Windows file system thumbnail. Without this information, OCHRE will not be able to display the image in its Map View. Make sure that the file has Spatial Reference information listed in its properties (if it doesn't, the file needs to be georeferenced). This gives you details about the file, some of which we will discuss below. Alternatively, load it as a Layer in the ArcMap view and right-click the Layer, then select Properties. Attempts to reduce such files would likely eliminate important data from these files - you probably don't want to do this!įirst of all, to view the properties of an image file, right-click it in the ArcCatalog and select Properties. These have geospatial data embedded in the file format and are thus expected to be large files. Note that we are not discussing primary geospatial images here like satellite images or elevation models (DEM). In any case, always work with a backup of your primary documents and retain high-resolutions copies of your source files for other uses outside of OCHRE or for publication purposes. The goal is to have adequate resolution for viewing the images while keeping file sizes as lean as possible. These might be scanned top-plans from excavations where the primary record was paper-based, or these might be images or maps scanned from printed publications. If a gis isn’t specified, it checks if we review some strategies for preparing raster files for use in OCHRE. You can save the output to BIL, BIP, BMP, BSQ, CRF, DAT, Esri Grid, GIF, IMG, JPEG, JPEG 2000, PNG, or TIFF format, or any geodatabase raster dataset. You can then mosaic or load raster datasets into this location. This function returns True if the GIS supports raster analysis. When you create a raster dataset, you are creating an empty location to contain a single raster dataset. To verify if your GIS has raster analysis capability, use the _supported(gis) method. ArcGIS Online does not yet support raster analysis. Raster Analysis is available in GIS if raster analytics server is configured and enabled. Verifying if GIS supports raster analysis To get an exhaustive list of raster functions, please refer to module.
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