PALM-4U Viewer

icon palm tree The PALM-4U Viewer supports the integration of

  • GeoJSON files (scenarios) generated by PALMClassify

  • TIFF result files generated in the post-processing of the PALM-4U GUI into the VC Map.

There are two ways to integrate the files. Firstly, as a temporary layer by the map user via the toolbox. Secondly, as a permanent layer when setting up the map using the App Configurator.

GeoJSON Files/Scenarios

GeoJSON files (scenarios) can be imported via the icon vector combine button. When integrating a GeoJSON file generated by PALMClassify, a vector tiles layer is created. This enables smooth rendering of the extensive GeoJSON files. Additionally, a feature info and styling aligned with the PALM-4U GUI, along with a corresponding legend, are assigned to it. After import, the created layer is added to the map and appears in My Workspace under the category “PALM-4U Scenarios”.

Here, the layer can be

  • activated/deactivated

  • deleted

  • renamed

  • edited

When editing, the Z-Index can be adjusted. This allows the drawing order to be changed. Layers with a higher Z-Index overlay layers with a lower Z-Index.

TIFF Result Files

TIFF result files can be imported via the icon checkerboard button. For displaying TIFF results, the plugin introduces a new TIFF layer. This can be styled by assigning color palettes. A legend is automatically generated for the assigned color palette and updated upon adjustments. After import, the created layer is added to the map and appears in My Workspace under the category “PALM-4U TIFF Results”. Here, the layer can be

  • activated/deactivated

  • deleted

  • renamed

  • edited

When editing, the following parameters can be adjusted:

Option Description

Opacity

Adjusts the opacity/transparency.

Z-Index

Adjusts the drawing order.

Linear/Discrete

Determines how the color scale is applied to the values of the raster. Linear distributes the color scale linearly over the value range. Discrete divides the value range into equally sized classes. Each class is assigned a color.

Color Gradient

Selection of different color scales.

Invert Color Gradient

Inverts the color gradient.

Minimum/Maximum

Sets the lower and upper end of the value range. The default setting is the minimum and maximum value of the raster.

Display Min/Max

Sets the range that is displayed. Cells with values outside this range are transparent. The default setting is the minimum and maximum value of the raster.

Additionally, the configuration of the layers can be exported via the icon kebab button in My Workspace under the category “PALM-4U TIFF Results”.

Since the PALM-4U GUI does not export the TIFF files in WGS84, they need to be reprojected. Otherwise, there will be a bias of the TIFF raster in the VC Map. This is currently not possible in the VC Map. To ensure correct display, the respective file must therefore be reprojected as an additional step, e.g., in QGIS using GDAL Raster Reprojection (Warp).