Winter is coming... https://turtletoy.net/turtle/2af55cf20b#leafs=2000,veins=26,twist=0.5,pTwist=0.85,maxDistance=120,centerFirst=1

I need to find the nearest distance between every pixel in my area of interest to the streamline closest to it. I'm using the following dataset for the streamlines ee.FeatureCollection("WWF/HydroSHEDS/v1/FreeFlowingRivers"). Initially, I thought image.cumulativeCost() would do the trick, but it seems like increasing the maxDistance only increases the buffer around the streamlines. The resulting value of cumulative_cost is 0 when the area is within the 1km buffer of the streamlines, and 'masked' otherwise. What are the values of the 'masked' pixels? Is it even feasible to achieve what I need using image.cumulativeCost()? var streams = ee.FeatureCollection("WWF/HydroSHEDS/v1/FreeFlowingRivers"); var roi = ee.Geometry.Polygon( [[[31.79857587268242, 40.34237834590226], [31.79857587268242, 39.1087726665225], [35.77013348986992, 39.1087726665225], [35.77013348986992, 40.34237834590226]]], null, false); //polylines representing river networks var filteredstreams = streams.filterBounds(roi); var streamImg = filteredstreams .reduceToImage({ properties: ['LENGTH_KM'], //picked a random property here just to convert the FeatureCollection reducer: ee.Reducer.first() //into an image }); //create a source image where the geometry is 1, everything else is 0 var streamsources = ee.Image().toByte().paint(roi, 1); streamsources = streamsources.updateMask(streamImg); var emptysource = ee.Image().toByte().paint(roi, 0); //define distance var maximumdist = 1000; //1km //cost image var thedist = emptysource.cumulativeCost({ source: streamsources , maxDistance: maximumdist, }); print(thedist); Map.addLayer(thedist);

In SpatiaLite's SQL functions for distance relationships we find * Distance() - return the distance between geom1 and geom2 * MaxDistance() - return the max distance between geom1 and geom2 But we don't find any MinDistance() function. Odd. So maybe Distance() is MinDistance() in the first place? OK, let's take these two lines I made with slashes. Pretend they are roads, \ / Is Distance() computed from each of their centroids? Or perhaps from their closest points? I suppose the only way to find out is to test it.

I need to find the nearest distance between every pixel in my area of interest to the streamline closest to it. I'm using the following dataset for the streamlines ee.FeatureCollection("WWF/HydroSHEDS/v1/FreeFlowingRivers"). Initially, I thought image.cumulativeCost() would do the trick, but it seems like increasing the maxDistance only increases the buffer around the streamlines. The resulting value of cumulative_cost is 0 when the area is within the 1km buffer of the streamlines, and 'masked' otherwise. What are the values of the 'masked' pixels? Is it even feasible to achieve what I need using image.cumulativeCost()? var streams = ee.FeatureCollection("WWF/HydroSHEDS/v1/FreeFlowingRivers"); var roi = ee.Geometry.Polygon( [[[31.79857587268242, 40.34237834590226], [31.79857587268242, 39.1087726665225], [35.77013348986992, 39.1087726665225], [35.77013348986992, 40.34237834590226]]], null, false); //polylines representing river networks var filteredstreams = streams.filterBounds(roi); var streamImg = filteredstreams .reduceToImage({ properties: ['LENGTH_KM'], //picked a random property here just to convert the FeatureCollection reducer: ee.Reducer.first() //into an image }); //create a source image where the geometry is 1, everything else is 0 var streamsources = ee.Image().toByte().paint(roi, 1); streamsources = streamsources.updateMask(streamImg); var emptysource = ee.Image().toByte().paint(roi, 0); //define distance var maximumdist = 1000; //1km //cost image var thedist = emptysource.cumulativeCost({ source: streamsources , maxDistance: maximumdist, }); print(thedist); Map.addLayer(thedist);

I need to find the nearest distance between every pixel in my area of interest to the streamline closest to it. I'm using the following dataset for the streamlines ee.FeatureCollection("WWF/HydroSHEDS/v1/FreeFlowingRivers"). Initially, I thought image.cumulativeCost() would do the trick, but it seems like increasing the maxDistance only increases the buffer around the streamlines. The resulting value of cumulative_cost is 0 when the area is within the 1km buffer of the streamlines, and 'masked' otherwise. What are the values of the 'masked' pixels? Is it even feasible to achieve what I need using image.cumulativeCost()? var streams = ee.FeatureCollection("WWF/HydroSHEDS/v1/FreeFlowingRivers"); var roi = ee.Geometry.Polygon( [[[31.79857587268242, 40.34237834590226], [31.79857587268242, 39.1087726665225], [35.77013348986992, 39.1087726665225], [35.77013348986992, 40.34237834590226]]], null, false); //polylines representing river networks var filteredstreams = streams.filterBounds(roi); var streamImg = filteredstreams .reduceToImage({ properties: ['LENGTH_KM'], //picked a random property here just to convert the FeatureCollection reducer: ee.Reducer.first() //into an image }); //create a source image where the geometry is 1, everything else is 0 var streamsources = ee.Image().toByte().paint(roi, 1); streamsources = streamsources.updateMask(streamImg); var emptysource = ee.Image().toByte().paint(roi, 0); //define distance var maximumdist = 1000; //1km //cost image var thedist = emptysource.cumulativeCost({ source: streamsources , maxDistance: maximumdist, }); print(thedist); Map.addLayer(thedist);

I need to find the nearest distance between every pixel in my area of interest to the streamline closest to it. I'm using the following dataset for the streamlines ee.FeatureCollection("WWF/HydroSHEDS/v1/FreeFlowingRivers"). Initially, I thought image.cumulativeCost() would do the trick, but it seems like increasing the maxDistance only increases the buffer around the streamlines. The resulting value of cumulative_cost is 0 when the area is within the 1km buffer of the streamlines, and 'masked' otherwise. What are the values of the 'masked' pixels? Is it even feasible to achieve what I need using image.cumulativeCost()? var streams = ee.FeatureCollection("WWF/HydroSHEDS/v1/FreeFlowingRivers"); var roi = ee.Geometry.Polygon( [[[31.79857587268242, 40.34237834590226], [31.79857587268242, 39.1087726665225], [35.77013348986992, 39.1087726665225], [35.77013348986992, 40.34237834590226]]], null, false); //polylines representing river networks var filteredstreams = streams.filterBounds(roi); var streamImg = filteredstreams .reduceToImage({ properties: ['LENGTH_KM'], //picked a random property here just to convert the FeatureCollection reducer: ee.Reducer.first() //into an image }); //create a source image where the geometry is 1, everything else is 0 var streamsources = ee.Image().toByte().paint(roi, 1); streamsources = streamsources.updateMask(streamImg); var emptysource = ee.Image().toByte().paint(roi, 0); //define distance var maximumdist = 1000; //1km //cost image var thedist = emptysource.cumulativeCost({ source: streamsources , maxDistance: maximumdist, }); print(thedist); Map.addLayer(thedist);

I'm just pushing out a small build. The main thing is a fix for animations freezing up things when swapping them out to help the Creator Jam New years event. I threw in a few small goodies as a present as well :3 I hope everyone's having happy holidays! New Features: - Added Mode to RadialForce (based on request by @baxterottoman, issue #3429) -- This allows you to switch the attenuation mode between InverseSquared, Linear and Constant - Added MinDistance & MaxDistance to RadialForce module...

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