I did a quick panorama for FLO to get a better idea of the skyline and obstructions. The view is from the mound just from in front of the telescope room door and facing south. I have included two panorama images below – one as an annotated JPG and the other as a PNG with a transparent sky for use in chart applications . A few notes first.
I didn’t have my compass with me while taking the pictures, so i assumed the buildings were oriented North-South and used the “south” facing view as the location for 180° in the reference image. However, when i checked Google Maps it appears the buildings are lined up a little west of south.
The aerial picture for FLO in Google Maps is low resolution so it was a bit of guess to get a precise reading – something between 7° and 18° west of south. I went with 18° (azimuth 198°) and adjusted my reference image accordingly. Also, aligning the camera to the buildings was a bit of guess, so there is some additional error there.
Next time i am at FLO i will recheck the orientation with my compass and then update the panorama images accordingly.
The tree line directly south appears to be about altitude 22°. The trees to the south east are a little lower at 18°. The large tree to the south west is altitude 24° at azimuth 253° (assuming the i have south in the right place).
The full sized images are 7200 x 1132 px with a scale of 20 pixels / degree. South (az = 180°) is in the image centre at x = 3600 px and the horizon (alt = 0°) is at y = 832px (0,0 being at the left-top). It is of course a full 360° panorama. Skyline altitude and azimuth to other points can be calculated from the pixel location and image scale.
You can click on the images below to view and download the full sized images.
The annotated panorama:
The PNG file should be suitable as a horizon panorama for some chart applications (e.g. Starry Night Pro). Although meta data is usually required by the application to describe the image scale and orientation (see below). (Note that some browsers display PNG transparent areas as white. But a downloaded PNG file has an alpha channel and with the right viewer, the sky will appear transparent.)
The PC version of Starry Night Pro 7 horizon meta data file describing the above PNG file is FLO-panorama-2018-02-10. SNP also includes a thumbnail version of the panorama. The program may create this the first time the horizon is used. If not, just create a 256x64px version of the panorama PNG file.