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https://issues.apache.org/jira/browse/IMAGING-266?focusedWorklogId=648342&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-648342
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ASF GitHub Bot logged work on IMAGING-266:
------------------------------------------
Author: ASF GitHub Bot
Created on: 09/Sep/21 03:06
Start Date: 09/Sep/21 03:06
Worklog Time Spent: 10m
Work Description: coveralls commented on pull request #165:
URL: https://github.com/apache/commons-imaging/pull/165#issuecomment-915723586
[](https://coveralls.io/builds/42745670)
Coverage decreased (-0.04%) to 76.689% when pulling
**f122b890fb36f55d12c19238e8cac293346dd21d on gwlucastrig:IMAGING-266a** into
**32e1a3b839eb75b38c47531cb2dd6e0012bb3bf5 on apache:master**.
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Issue Time Tracking
-------------------
Worklog Id: (was: 648342)
Time Spent: 0.5h (was: 20m)
> Read integer data from GeoTIFFS
> --------------------------------
>
> Key: IMAGING-266
> URL: https://issues.apache.org/jira/browse/IMAGING-266
> Project: Commons Imaging
> Issue Type: New Feature
> Components: Format: TIFF
> Affects Versions: 1.0-alpha3
> Reporter: Gary Lucas
> Priority: Major
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> I recently discovered that there is a large amount of digital elevation data
> available in the form of 16-bit integer coded data in GeoTIFF files (TIFF
> files with geographic tags). I propose to enhance the Commons Imaging API to
> read these files. This work will be similar to the work I did for reading
> floating-point raster data under ISSUE-251.
> Available data include the nearly-global coverage of one-second of arc
> elevation data produced from the Shuttle Radar Topography Mission (SRTM) and
> other sources. These products give grids of elevation data with a 30 meter
> cell spacing for most of the world's land masses. They are available at NASA
> Earthdata and Japan Space Systems websites, see
> [https://asterweb.jpl.nasa.gov/gdem.asp|https://asterweb.jpl.nasa.gov/gdem.asp]
> There is also a ocean bathymetry data set available in this format at
> [http://www.shadedrelief.com/blue-earth/]
> This new feature will continue to expand the usefulness of the Commons
> Imaging API in accessing GeoTIFF products.
> Request for Feedback
> So far, the data products I've found (ASTER and Blue Earth Bathymetry) give
> elevation and ocean depth data in meters recorded as a short integer. I
> haven't found an example of where the 32-bit integer format is used. For
> now, I am planning on only coding the 16-bit integer variation. Does anyone
> know if the 32-bit version is worth supporting? My criteria for determining
> that would be based on whether there is a significant number of projects
> using that format (life is too short to chase rarely used data formats).
> Currently, one of the code-analysis operations conducted by the Commons
> Imaging build process is coverage by JUnit tests. Lacking any test data for
> the 32-bit case, I am reluctant to include it in the code base because it
> would mean putting uncovered code into the distribution.
> Also, I am wondering about the best design for the access API. The current
> TiffImageParser class has a method called getFloatingPointRasterData() that
> returns an instance of TiffRasterData. TiffRasterData is pretty much
> hard-wired to floating point data. I am thinking of creating a new method
> called getIntegerRasterData() that would return an instance of a new class
> called TiffIntegerRasterData. Does this seem reasonable? I considered trying
> to combine both kinds of results into a unified class and method, but it
> seems more unwieldy than useful.
>
>
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