(Already solved) UnboundLocalError in get_z_from_dsm() when DSM is too small

[Ken-Kuroki]

Hi, I encountered an error with certain DSM files. When I run

roi = easyidp.ROI("roi.shp")
roi.get_z_from_dsm("dsm.tif")

Then Exception has occurred: UnboundLocalError (note: full exception trace is shown but execution is paused at: _run_module_as_main) local variable 'imarray_out' referenced before assignment at the 109 line of cvtools.py.

It looks when dim==1 the variable isn't set. I eventually figured out the DSM file resolution was not enough and with small plots in my .shp file, probably each plot only made up an area smaller than one pixel. The error was solved after increasing the DSM image size.

I don't think this is an issue, but just sharing since other users may find the same error.

[HowcanoeWang]

dim==1 seems you only get one pixel with color info.
e.g.

>>> a = np.array([255,255,255])
>>> len(a.shape)
1

Provide a better notice in df25235:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File ".../easyidp/cvtools.py", line 109, in imarray_crop
    raise ValueError(
ValueError: Only image dimention=2 (mxn) or 3(mxnxd) are accepted, not current[shape=(3,) dim=1], please check whether your ROI is smaller than on pixel.

[Ken-Kuroki]

Thank you as always for addressing it very quickly!