Longitudinal profile MapStore plugin

[tdipisa]

It is requested to migrate the Profil en long plugin to MapStore by creating a new extension for it as it has already been done for Cadastrapp, Urbanisme and many other extensions.

The functionalities of the plugin are based on a backend counterpart that is represented by a WPS process in GeoServer that is responsible of generating the longitudinal profile.

The longitudinal WPS process is ready in GeoSolutions DEV and there is an example of request and response in the README file. The code of the old plugin for mapfishapp is available here for reference if needed.

As far as the existing plugin functionalities are concerned:

• Draw/import a linear (geojson): be able to draw the profile but also to import a profile in geojson format

• Download the resulting image: for the charts the same library used by MS can be used (PlotlyJS). It should natively provide the ability to download the chart

  

• Export the profile: as present in the older plugin it should be possible to export the profile params in CSV format. This functionality is provided in the old mapfishapp by a dedicated webservice (eg. https://geoportail.lepuyenvelay.fr/mapfishapp/ws/csv/) but the MS extension must not rely on mapfishapp components, the aim is to replace it, so the CSV should be generated client side possiblyfrom the WPS response

  

• Set up one or more support layers (DTM, DEM,…) in the plugin: this functionality is referring to the existing functionality depicted below. This allows the user to set up the parameters for the WPS request and all of these things are already supported by the WPS backend. It is only needed to reproduce the same and make it possible to configure the desired options for dropdowns

  

• A functionality which was present on the old plugin but, but absent in the plugin installed in GeoSolutions DEV, is the function called "profile from a selection" which allows after a selection of a layer feature of type line, to draw the profile of this entity (see the option "Selection to profile" in the image below)

  The use case is as follows:

  • Selection of a linear feature in a line layer present in the TOC and displayed it in the map
  • Generate and display the profile

  For this it would be good to provide an option in the new MS tool to allow the user to select a feature in map of a selected layer in TOC, display that selection and use the related geometry line for the WPS.

• Last but not the least a new MS extension should be provided for the plugin in the same way of the other existing (eg. Cadastrapp). A new Github repo has been created for that purpose

Other useful information

Additional DEM data for the WPS backend are available if needed. https://geoservices.ign.fr/rgealti has download links for 1m and 5m datasets for every region of france.

[tdipisa]

@alexander-fedorenko let's work first on the design using a side panel.

[tdipisa]

@catmorales few points below to show our design and the progress on it.

1. Once the page is loaded, user can see a menu item in sidebar

2. Clicking on "Draw profile" will start the drawing session, the standard line creation workflow when the user clicks on the map and clicks once more on the end point to complete the drawing. Popovers on the map will guide you through the drawing process.

3. Clicking on the “Load GML file” the usual import interface will open. Once the GML file is imported, a line from the GML file will be drawn on the map and the side panel will open to show the result of the process

4. Clicking on the “Selection to profile” menu item the selection process is activated. The user will see a popover near the pointer on the map guiding through the steps needed for generation. The popover will also show the name of the selected layer once the user selects it in TOC.

5. The parameters can be changed prior to the profile drawing, the GML loading or the usage of a selected feature. Clicking on the menu item the modal will open so that the user will be able to select the layer and resolution (distance) to be user for the process (this is configurable from plugin config)

A Side panel will display the result of the profile generation, it will have three tabs just like the original plugin.

• First tab will render plotly chart with capability to:
  • Download CSV
  • Download PNG
  • Maximize chart in modal
  • Other basic features of plotly chart (see widgets charts)
• Second tab will show the process detail: reference, length of the profile, changes in height, amount of the points used
• Third tab will allow the user to change layer reference & distance (resolution). All the changes are applied on the fly, data will be recalculated instantly on change

[landryb]

great stuff, that all looks awesome and good - minor nit, sure the previous version in mfapp allowed to import a GML file, but in 2022 i think geojson is better :) That's also what is mentioned/specified in comment 1.

[tdipisa]

That's also what is mentioned/specified in comment 1

yes indeed, thank you so much. @alexander-fedorenko please correct the mockup above and keep note about that: we have to effectively use geojson and not GML.

[tdipisa]

Work in pending review here.