Alternatives to SRTM DEM

[Huite]

I was testing generating an iMOD model, and I got some very low values of around -200 m for the SRTM DEM.

There's probably many filtered DEMs available, which one is ideal probably depends on the use case. E.g. for groundwater modeling I would prefer a robust, relatively smooth one: many boundary conditions rely on an elevation and large jumps generate extreme flows between them, reducing model robustness.

What are good contenders? (And can they be made available through HydroEngine?)

[gena]

For global applications, maybe ALOS would be a good alternative, it's smoother in flat areas (much smaller high-frequency noise). For some areas, a higher resolution dem can be provided, e.g. 10m NED for US, 0.5m for NL (with gaps), Canadian DEM, an a few others. I will probably make get_dem() return mosaic, and allow specifying the actual product to query specific DEM.