# World to/from pixel

## pixel_solid_angle_arcsec2

This script calculates the solid angle subtended by a pixel in a 2D FITS image
(in arcsec^2).

```{include} files/help_numina-pixel_solid_angle_arcsec2.md
```

## pixel_to_world

Auxiliary script to convert from pixel coordinates to celestial coordinates and
wavelength. There is also the script `numina-world_to_pixel`, which performs
the inverse transformation.

```{include} files/help_numina-pixel_to_world.md
```

## world_to_pixel

Auxiliary script to convert from celestial coordinates and wavelength to pixel
coordinates. There is also the script `numina-pixel_to_world`, which performs
the inverse transformation.

```{include} files/help_numina-world_to_pixel.md
```