Recent Changes

Monday, August 14

  1. page Running OCHRE Offline edited ... updated May, June June, August 2017 As of the summer of May 2014, OCHRE is equipped with …
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    updated May, JuneJune, August 2017
    As of the summer of May 2014, OCHRE is equipped with a new feature that allows for a powerful, albeit somewhat constrained, user experience that does not require a constant Internet connection. In particular, this gives archaeologists a new option for taking OCHRE into the field to do primary data capture on the spot.
    Considerations Regarding Working Offline
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    Importing Text items and organizing Discourse hierarchies
    Agnostic variables are available for use offline automatically. OCHRE will determine whether or not they are being used and will take along any supporting details it needs to the offline session. The standard Measurements hierarchy from the OCHRE master project does not need to be included in the offline session.
    Bibliography can be linked to other items unless the bibliography is managed exclusively through the Zotero API. If bibliographic entries are native to OCHRE, or there are OCHRE stubs for Zotero items, and if the offline user has Insert/Delete access to the Bibliography category, then bibliography links can be made offline.
    Hotspotting of images can be done offline as long as the hierarchy containing the images is included in the offline session. Only thumbnails of images will be offloaded, and they will be cached locally to minimize downloading in subsequent sessions.

    GEO features; basemaps and/or source files for shapes (geodatabases/shapefiles) will be detected and offlined as needed by the items participating in the offline session.
    Note that if a hierarchy is offlined that has its own basemap, that hierarchy's basemap will be taken along offline and the GEO session will use that local basemap as if it were the project basemap.
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    Running Queries
    Changing GEO specifications
    Trouble-Shooting
    If, when offline, you get the error message stating that there is no basemap available for the offline GEO session:
    Check that you have clicked ON the option to "Include GEO content offline" in the User's Offline profile. This is defaulted OFF since it would normally entail downloading a much more significant amount of geospatial data (raster images, shapefiles, etc.) and we don't want this to happen unintentionally.
    Check that you have included a basemap with the User's Offline profile. This could be done by linking in the Resource Inbox (to get the project's default basemap), or by listing first a Locations & Objects hierarchy that has its own local basemap specified.

    (view changes)
    9:19 pm

Friday, July 28

  1. page Strategies for Creating Raster Images edited ... {GEO_splitView.JPG} Select the Pixel Type field of the Copy Raster table and set it to 8_BIT…
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    {GEO_splitView.JPG}
    Select the Pixel Type field of the Copy Raster table and set it to 8_BIT_UNSIGNED from the pick-list. Right-click the Pixel type field and select Fill to populate the entire column with this value. Click the "Check values" button -- this will auto-generate the default Output name for each file in the Input list. Click OK to start the Batch process.
    NoData Values
    There may be areas of a raster that do not represent a data point -- that is, they are "NoData." This may happen, for example, if you georeference a scanned topplan and the process of georeferencing shifts (appropriately) the image to align with the spatial reference. To control the appearance of pixels that represent "NoData" specify a color value for these either when you Save or Copy a Raster. Here the value of 0 was used (or defaulted) resulting in black displaying for NoData-pixels.
    {GEO_NoData.JPG} NoData!
    A better option is to use a color outside of the normal range; hence we often see the value of 256 used for NoData. This results in no color being assigned, creating an effect as if those areas were transparent.
    Here, for example, when you georeference an image and finish up with the Rectify option, you can save the file with a NoData value of 256 so that unused pixels do not display inappropriately.
    {Rectify.JPG}

    Color Bands
    Sometimes a tif file is using more "color bands" than is necessary to represent the image. For example, if a black-and-white or grayscale image is using 3 color bands (Red, Green, and Blue) it is using 3 copies of the same information. We can throw away 2 of the "color" bands without losing any information and in the process reduce the file size by 2/3s. That is, a file should not be using redundant color bands unnecessarily.
    (view changes)
    1:09 pm
  2. file Rectify.JPG uploaded
    1:08 pm
  3. file GEO_NoData.JPG uploaded
    1:03 pm

Wednesday, July 19

  1. page Launching OCHRE, Trouble-shooting edited ... Updated July 29, 19, 2017 Problems installing Java 8 Update 131/141 Some new issues have…
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    Updated July 29,19, 2017
    Problems installing Java 8 Update 131/141
    Some new issues have been raised with respect to Java, so please read the details below if you are having trouble starting up OCHRE. Java now accommodates the 64-bit system architecture, the use of which is becoming more prevalent among our user base, and so we have set OCHRE to take advantage of this. Overall it will result in a better user experience and so we highly recommend taking the steps to ensure that you are using the most effective configuration.
    (view changes)
    10:52 pm
  2. page Launching OCHRE, Trouble-shooting edited ... April 23, 2017, Updated July 29, 2017 Problems installing Java 8 Update 131/141 Some new …
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    April 23, 2017, Updated July 29, 2017
    Problems installing Java 8 Update 131/141
    Some new issues have been raised with respect to Java, so please read the details below if you are having trouble starting up OCHRE. Java now accommodates the 64-bit system architecture, the use of which is becoming more prevalent among our user base, and so we have set OCHRE to take advantage of this. Overall it will result in a better user experience and so we highly recommend taking the steps to ensure that you are using the most effective configuration.
    (view changes)
    10:52 pm
  3. page Launching OCHRE, Trouble-shooting edited January 2017, Updated April 23, 2017 ... 8 Update 131 131/141 Some new issues have been rais…
    January 2017, Updated April 23, 2017
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    8 Update 131131/141
    Some new issues have been raised with respect to Java, so please read the details below if you are having trouble starting up OCHRE. Java now accommodates the 64-bit system architecture, the use of which is becoming more prevalent among our user base, and so we have set OCHRE to take advantage of this. Overall it will result in a better user experience and so we highly recommend taking the steps to ensure that you are using the most effective configuration.
    If you are a Macintosh user:
    (view changes)
    10:52 pm
  4. page Launching OCHRE, Trouble-shooting edited ... {AboutOCHRE.JPG} About OCHRE Still having problems? Please contact us. ... 8 Update 131 …
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    {AboutOCHRE.JPG} About OCHRE
    Still having problems? Please contact us.
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    8 Update 131131/141
    On Windows
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    8 Update 131131/141 then you
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    8 Update 131.141. Alternatively, the
    {Java update now.JPG} Update Java
    (view changes)
    10:52 pm

Tuesday, July 18

  1. page Strategies for Creating Raster Images edited ... Other issues, scientific notation Sometimes the georeferencing data ends up saved in the asso…
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    Other issues, scientific notation
    Sometimes the georeferencing data ends up saved in the associated world file (.tfw) by ArcMap in scientific notation which prevents the image from displaying correctly in OCHRE. If this happens the world file needs to be edited (using any simple text editor) and the scientific notation converted to regular integer/decimal format.
    OtherBlackTifsOther issues, images
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    black in ArcMapArcMap, in OCHRE and in the Windows file system thumbnail. This may happen for several reasons and there are a few things you can try to have it view normally for OCHRE.
    Check to see
    if it
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    unexpected compressed format. Checkformat -- you will find the compression typeCompression Type on the layer Properties. Try re-savingIf so, re-export it (right-click,
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    LZW compression).
    If

    Check
    the TIF file shows up in ArcMap as just a blank square, or as a completely black square, on the Layer representing the tif, right-click to getSymbology tab of the layer Properties menu option. Go to the Symbology tab and make
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    necessary.
    If the image shows up as a black square when viewing it from OCHRE, and if the image
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    In some casecases this will
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    this process.
    Alternatively, if

    If you can view
    the image normally in ArcMap but it shows up as a black square when viewing it fromin OCHRE, re-exporttry re-exporting (right-click, Data,
    {GEO_FixBlackRaster.JPG}
    Something always to check is whether Windows can display the image thumbnail in the folder View. If it is a black image here, then OCHRE will not be able to display it either.
    (view changes)
    5:35 am

Friday, July 7

  1. page Strategies for Creating Raster Images edited ... From the ArcCatalog, select the folder containing the files to be converted, then click the Ne…
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    From the ArcCatalog, select the folder containing the files to be converted, then click the Next-view button to get the split-view listing of the files (so that they can be selected as a group). Shift-click to select the required batch of file then drag-drop them onto the Input Raster column of the Copy Raster table.
    {GEO_splitView.JPG}
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    Batch process.
    Color Bands
    Sometimes a tif file is using more "color bands" than is necessary to represent the image. For example, if a black-and-white or grayscale image is using 3 color bands (Red, Green, and Blue) it is using 3 copies of the same information. We can throw away 2 of the "color" bands without losing any information and in the process reduce the file size by 2/3s. That is, a file should not be using redundant color bands unnecessarily.
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    {GEO_cellsize_SaveAs.JPG}
    The Cell size can be changed in batch mode for a group of files. In the ArcToolbox, search for the Raster Resample tool and right-click to get the Batch option. Add the files from the ArcCatalog to the Input window. Specify the Output destination. In the Cell Size field enter the new value. Right-click the field and select Fill to populate the entire column.
    Other issuesissues, scientific notation
    Sometimes the georeferencing data ends up saved in the associated world file (.tfw) by ArcMap in scientific notation which prevents the image from displaying correctly in OCHRE. If this happens the world file needs to be edited (using any simple text editor) and the scientific notation converted to regular integer/decimal format.
    BlackOther issues, images appearing black
    Sometimes the image will show up black in ArcMap if it is in an unexpected compressed format. Check the compression type on the layer Properties. Try re-saving it (right-click, Data, Export data) in an uncompressed format in order to view it normally.
    If successful, you can then re-export it using a supported format (e.g. LZW compression).
    If
    the TIF
    If the image shows up as a black square when viewing it from OCHRE, and if the image is a 16-bit grayscale image, try converting to 8-bit pixel depth as described above. In some case this will fix the black-square problem as it is re-saved as part of this process.
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    from OCHRE, re-savere-export (right-click, Data,
    {GEO_FixBlackRaster.JPG}
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    it either.
    {GEO_BlackJPG.JPG}
    (view changes)
    2:48 pm

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