First, Vernon, thank you for the libremap.org
reference. I had not seen that
before, and have generally used the USGS or National Map sites. This looks
Probably someone who has done this will respond, but I can speak to the
Presuming you have Photoshop? And, you know something about using it?
First -- the maps need to be a format that Photoshop can read. Say, jpeg or
tiff. It reads many others, those are just a couple. The libremap site
gives you a choice of formats, choose TIFF.
Then. Open each file in Photoshop. Check the size of the maps. Check the
dpi. The map for Sharpsburg is a 7.5 minute topo that is 5530 pixels by 6898
pixels (22.12" x 27.592") at 250 px/inch.
North Middletown is 5514x6891 (22.056x27.564) at 250.
Open a new file, using the total of the two maps for the dimensions.
That would be 44.176 x +- 28. I would make it 46x30" to allow for offset.
Use 250 for the dpi. Your default may be in pixels, but you can change it to
Now, with each of the original files, copy (ctrl A; Ctrl C) and paste (ctrl
V) the image from the original file to the new file. From there, you will
adjust the maps so they line up.
First separate the two maps. North Middletown on the left, Sharpsburg on the
right. Because the maps are not square, you will need to drag a guide line
from the top ruler (be sure you have it open), then selecting each one
separately, do a Ctrl T and rotate till the top of the map is even with the
blue guide line.
Now, because the margins have some writing in them, you will have to get rid
On the Sharpsburg map, using your "rectangular marquee tool, begin right
below the 38.15 mark, and drag down a ways. I'd do this in pieces, because
even at 30% on the zoom, you can't see more than a third of the page (on my
monitor, anyway). Cut out the white. If it makes it easier, turn off the
other layers, so you can see the white more easily. If your map isn't
square, it will be obvious, so you may have to square it up again.
I had Sharpsburg as the top layer. You can now grab that layer and move it
left until it marries up with the North Middletown panel. I put it at 100%
for this. There is a fine black line, but that's ok, it will help you know
where the 7.5 quads begin and end. There are enough lines going across you
should be able to do this pretty easily.
Now, change the zoom to full and with the "rectangular marquee tool" make a
rectangle that includes both images. If you only want a piece, only select
that much. On the menu bar, select edit, copy merged.
Then, make another new file, with the settings it probably has for the "from
clipboard" and paste your combined map. Make sure it has 250 for the dpi.
Save as a jpeg file. When I saved the whole thing, by the way, it was some
185 megabytes. Pretty big file.
Now, to put into DMU, you need the scale, (at the bottom of the map) which
someone who does this often can help you with.
Hope this helps.
[mailto:email@example.com] On Behalf Of ThrelkeldStein
Sent: Monday, January 17, 2011 11:33 PM
Subject: [DMU] Use of adjacent USGS Quads for Background Maps: novice
I have used DeedMapper on and off (more "off," I confess) for several years,
but have never used background maps. I want to do that now, but I find both
the Help instructions and the mailing list discussions above my pay grade
for this issue.
In the particular project I'm working on, I know the property locations on
the USGS maps with near proximity. However, the various plots cover two
quadrangles (North Middletown and Sharpsburg in Kentucky in this case).
I have downloaded both maps from libremap.org
Is it possible to put the two quads (or portions thereof) together to form
one background map for a particular deed file? I heard somewhere that Adobe
Photoshop could be used, but I have no clue how. Would appreciate any help
to get me started, if in fact such a map 'merger' can be done. Thanks.
Vernon Threlkeld (using vs. 4.1)
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