<div dir="ltr">I just go with the best available image for the area & follow that! Around here, that's almost always Bing as it's "usually" the clearest in our area (although you have to zoom in to 19 or 20 to get the best view :-()<div><br></div><div>Further out, it & the others are all so fuzzy that it's almost impossible to pick fine detail :-(</div><div><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr">Thanks<div><br></div><div>Graeme</div></div></div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr">On Sat, 12 Jan 2019 at 10:26, John Willis <<a href="mailto:johnw@mac.com">johnw@mac.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Another quick question:<br>
<br>
Mapping in Japan. <br>
<br>
<br>
in iD, we have some imagery to choose from: <br>
<br>
- Bing imagery (from very very good to meh),<br>
- a Japanese government GIS render (which is okay, a patchwork of different vector illustrations) [Japan GSI standard Map]<br>
- a Japanese “ortho” view, imagery with almost no off-angle tilt. [Japan GSI ortho imagery]<br>
<br>
The issue I am facing is that, even after some adjustment of the angle of bing imagery, there seems to be some distortion. things don’t line up well between the Bing and ortho maps in some places, and are much closer in others. a *lot* of the mapping aligns with the bing imagery, but there are areas of obvious 2-3m distortion in places (the road is wavy), but other areas of newer/clearer imagry align with the ortho imagry. <br>
<br>
It is a difference of only a few meters, but with the insane complexity of even farming roads, a clash of a few meters between different mappers looks bad. <br>
<br>
What do you guys do in such situations?<br>
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</blockquote></div>