[kozskan]

Hi Chrym,

Yes, I get the layer to the QGIS. The raster layer, where each sell was
representing the vector of velocity and its magnitude was converted to
points. Then I filtered small unwanted values which would mess the whole
layout (just set a threshhold). Then QGIS, in symbology of given point layer
you need to select the symbol (an arrow). The arrow symbol has its
properties – magnitude and orientation and both are yeilded by hecras (you
set it by opening the source fileld and choose the correct one in attribute
table). The raster layer underlaying the vector layer is just the same layer
which is stratified based on magnitude.

[kozskan]

Hi Toby,

I followed the discussion and I wonder if you have any clue how to create the static map of velocity arrows? I’ve extracted FacePoints Coordinate, Node X Vel and Node Y Vel in R from the HDF but I am kind of struggling with the structure of data used to create the layer that I want to use in qgis in order to create the map.

I assume it should be mesh layer but somehow can not create it along with the vectors that represents the actual flow direction. My aim is to create a static map, similiar to wind map, where the ground would be colored based on the flow rate (m3/s) and vectors would indicate the flow direction.

Thanks for any advice,
PK

[Author]

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