Grid lines feature - I have a few questions

[James van Scoyoc]

I was recently pleased to discover that the Astrometry site can apply a declination/RA grid to submitted images.   This brings up a few questions that I have:

1. Is there a way to get the grid and the annotations in a single pass, so that both will appear on the final resulting image? As it is, I know no other way than to submit the image twice, first to get the grid, and second to get the annotations.
2. Is there a way to increase the density of the grid?  
3. Finally, is there a way to get the numerals on the grid?  Or if not, is there a simple way to figure out what the numerals would be, other than by looking up individual stars to determine them?

[Dustin Lang]

Hi,

For (1) and (2), currently, no, unfortunately not, but it would be a good additional feature!

Could you please send an example where (3) fails?  The numerals may be at the top of the image, hidden by the "original | red-gree | annotated | ..." menu bar?

cheers,

dustin

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[Dustin Lang]

ps, the code tries to guess at the appropriate grid density and label density, so maybe your image has a scale or axis ratio that falls into a gap where that decision is poor!

[James van Scoyoc]

OK, now I do see the numerical markings.  They're very small if you use the full size image, and they are rather faint, but I think I can fix that last bit in Photoshop.  I always have to do a lot of post processing anyway, so it really isn't an issue.

As for the size of my images with respect to the sky, it seems that when I use a 50mm camera lens the field of view is approximately 26x17 degrees, which is fairly constant but for variations of a few tenths of a degree.  I''m using just a camera and a tripod, usually with the 50mm lens, but sometimes I use a 35mm when I'm willing to sacrifice aperture for getting more of the sky in a shot.`

[James van Scoyoc]

ETA: Regarding the number of passes, I have just found a way to do it in one pass--sort of ish.   Let's call it a pass and a half.

1. On the Results page from a successful solve, click on the GRID option.
2.  Over at top right,  right-click on the Fullsize link, and in the context menu that appears, click on "Copy Link".   
3. Click on UPLOAD, as if you were going to submit a new image.  When the choose file dialog appears, instead choosing a file on your system, tick the radio button to enter a URL, and simply copy in the URL that you saved in previous step.

So while it's still necessary to do two separate passes, at least for the second one you don't have go browsing your directories again; instead you can simply paste in the URL.