Raster metadata
From AWF-Wiki
(Difference between revisions)
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# Click the {{button|text=Add raster layer}} [[Image:QGIS_2.0_addrast.png|20px]] and select the file ''C:/OSGeo4W64/geodata/raster/s2/Subset_S2A_MSIL2A_20170619T.tif''. | # Click the {{button|text=Add raster layer}} [[Image:QGIS_2.0_addrast.png|20px]] and select the file ''C:/OSGeo4W64/geodata/raster/s2/Subset_S2A_MSIL2A_20170619T.tif''. | ||
| − | # After clicking {{button|text=Open}}, the raster layer | + | # After clicking {{button|text=Open}}, the raster layer appears on the QGIS canvas. |
| − | # Right click the layer name in the [[TOC]] and select {{mitem|text=Properties --> General}}. Report the spatial reference system, size (columns and rows in pixels) and if a No-Data value is assigned. | + | # Right click the layer name in the [[TOC]] and select {{mitem|text=Properties --> General}}. Report on the spatial reference system, size (columns and rows in pixels) and if a specific No-Data value is assigned. |
| − | # Choose {{mitem|text=Properties --> Metadata}} [[Image:QGIS_2.0_metadata_info.png| | + | # Choose {{mitem|text=Properties --> Metadata}} [[Image:QGIS_2.0_metadata_info.png|100px]]. In the "properties" window scroll down and have a look on univariate descriptive statistics such as minimum, maximum, mean and standard deviation for each band. How many bands are included in the multiband file? If statistics are not shown for all bands go to {{mitem|text=Properties --> Histogram}} and click {{mitem|text=Prefs/Actions --> Recompute Histogram}}. |
# Jump back to the Metadata tab and report: | # Jump back to the Metadata tab and report: | ||
| − | * Pixel | + | * Pixel size |
* No Data Value | * No Data Value | ||
* Data type | * Data type | ||
| − | * Layer spatial | + | * Layer spatial reference system |
* Layer extent (Xmin, Ymin, Xmax, Ymax) | * Layer extent (Xmin, Ymin, Xmax, Ymax) | ||
[[Category: Working with Raster Data]] | [[Category: Working with Raster Data]] | ||
Revision as of 15:04, 22 October 2017
- Click the Add raster layer
and select the file C:/OSGeo4W64/geodata/raster/s2/Subset_S2A_MSIL2A_20170619T.tif.
- After clicking Open, the raster layer appears on the QGIS canvas.
- Right click the layer name in the TOC and select Properties --> General. Report on the spatial reference system, size (columns and rows in pixels) and if a specific No-Data value is assigned.
- Choose Properties --> Metadata
. In the "properties" window scroll down and have a look on univariate descriptive statistics such as minimum, maximum, mean and standard deviation for each band. How many bands are included in the multiband file? If statistics are not shown for all bands go to Properties --> Histogram and click Prefs/Actions --> Recompute Histogram.
- Jump back to the Metadata tab and report:
- Pixel size
- No Data Value
- Data type
- Layer spatial reference system
- Layer extent (Xmin, Ymin, Xmax, Ymax)
