  We present the Sloan Digital Sky Survey V (SDSS-V) Local Volume Mapper (LVM).
The LVM is an integral-field spectroscopic survey of the Milky Way, Magellanic
Clouds, and of a sample of local volume galaxies, connecting resolved pc-scale
individual sources of feedback to kpc-scale ionized interstellar medium (ISM)
properties. The 4-year survey covers the southern Milky Way disk at spatial
resolutions of 0.05 to 1 pc, the Magellanic Clouds at 10 pc resolution, and
nearby large galaxies at larger scales totaling $>4300$ square degrees of sky,
and more than 55M spectra. It utilizes a new facility of alt-alt mounted
siderostats feeding 16 cm refractive telescopes, lenslet-coupled fiber-optics,
and spectrographs covering 3600-9800A at R ~ 4000. The ultra-wide field IFU has
a diameter of 0.5 degrees with 1801 hexagonally packed fibers of 35.3 arcsec
apertures. The siderostats allow for a completely stationary fiber system,
avoiding instability of the line spread function seen in traditional fiber
feeds. Scientifically, LVM resolves the regions where energy, momentum, and
chemical elements are injected into the ISM at the scale of gas clouds, while
simultaneously charting where energy is being dissipated (via cooling, shocks,
turbulence, bulk flows, etc.) to global scales. This combined local and global
view enables us to constrain physical processes regulating how stellar feedback
operates and couples to galactic kinematics and disk-scale structures, such as
the bar and spiral arms, as well as gas in- and out-flows.
