Describe the bug

If partition tag set empty string, the message returned should be

  reason: "Invalid partition tag:  Partition tag should not be empty."

Search failed:
status {
  error_code: ILLEGAL_ARGUMENT
  reason: "Invalid partition tag: . Partition tag should not be empty."
}

Steps/Code to reproduce behavior

Expected behavior

**Env

See below; version 2.4.2 from the ubuntugis ppa.

Expected output is just the version information, no crash.

$ gdal2tiles.py --version
GDAL 2.4.2, released 2019/06/28
Traceback (most recent call last):
  File "/usr/bin/gdal2tiles.py", line 2927, in <module>
    main()
  File "/usr/bin/gdal2tiles.py", line 2917, in main
    input_file, output_folder, options = process_args(argv[1:])

Hi,

As it been considered to support alternative normalized device coordinates for Orthographic3 and Perspective3 ?
Currently both follow the OpenGL convention so are not usable in other situations (Vulkan for instance).

I am willing to work on it if it is desired to have that in nalgebra.

I can think of two approaches:

• have separate structures in separate pathes within the crate
• u

I've noticed that this app doesn't contain a bundle identifier key in the Info.plist (https://github.com/synfig/synfig/blob/master/autobuild/osx/app-template/Contents/Info.plist)

every macOS app is supposed to have a unique CFBundleIdentifier

https://developer.apple.com/documentation/bundleresources/information_property_list/cfbundleidentifier

An option like $ fio cat --bounds w s e n --bounds-crs <crs> --dst-crs <crs> would allow for filtering prior to reprojection, like $ ogr2ogr -spat w s e n -spat_srs <crs>.

See Toblerity/Fiona#210 for a discussion about standardizing bounding boxes as --bounds w s e n rather than --bbox w,s,e,n.

Add Runnable links of the code below the example.
Use link name Run Code which links to a Online C++ complier conatining the example code.
Use Rextester as the Online C++ Compiler (If you have a better suggesstion please comment).

Follow below steps to generate the Run Code Link.

1. Go to Rextester
2. Copy or write the example