Allow filtering by geo boundaries

[heshan0131]

• Allow an option to ‘filter points by polygon’ in point layer, select polygons inside a Geojson layer or a polygon drew by the user to filter by.

• Use turf.js to filter points inside or outside of the selected polygon.

• Allow an option to filter arcs/lines by whether it begins or end inside the polygon.

[macrigiuseppe]

@heshan0131 I am looking at turf.js, should we use:

• one point: https://turfjs.org/docs/#booleanPointInPolygon
• many points: https://turfjs.org/docs/#pointsWithinPolygon to filter points within a polygon

or are there another methods we should use?

[macrigiuseppe]

The new polygon filter will be treated as a regular filter and added to Filters in vis-state. Because the each new polygon filter will required to be mapped against an existing layer, we need to properly create a connection between a filter and layer.

• We are going to add a new property layerId in Filter to track connection between polygon filter and layers.
• We need to modify filterData in order to apply the new filters.
• The current dataset will be filtered based on the polygon filter layer properties (shape and and layer columns)

[seanosterday]

@macrigiuseppe I can see that the filter by drawn polygon works but was the filter by a geojson layer ever implemented? I am not seeing this in the demo app.

[maxwell-oroark]

+1 to @seanosterday's comment. It is unclear what I can presently accomplish with the draw tool in the demo app. I created a shape and added a data layer to the "Geo" filter but when I go to export "filtered data" the # of rows in the dataset are exactly the same, regardless of how restrictive my polygon is

[macrigiuseppe]

@macrigiuseppe I can see that the filter by drawn polygon works but was the filter by a geojson layer ever implemented? I am not seeing this in the demo app.

@seanosterday we currently don't support filter by geojson layer

[macrigiuseppe]

export "filtered dat

@maxwell-oroark i have tried the export functionality after filtering points using the draw tool and it works. See below: