[OSM-Talk-ZA] Updated CD:NGI Aerial Imagery Now Available

[Grant Slater]

On 31 December 2012 12:39, Gerhardus Geldenhuis
<gerhardus.geldenhuis at gmail.com> wrote:
> Thanks for the efforts Grant. When you say errors, what does this mean? Does
> it mean tracing using the imagery surrounding erross will be inaccurate?

The imagery is great for tracing and normally of excellent positional
accuracy. (Better than Bing Aerial in most cases)
The errors are mistakes I have made or bugs in the source files
leaving some sections blank.
Example: http://aerial.openstreetmap.org.za/?zoom=10&lat=-31.2195&lon=23.25729&layers=B0

> Can
> we help with conversion/fixing work?

Naaa, I just need to go through it and work out what is causing the
bug... I suspect a problem with the GeoReferencing on a small subset
of the source files.

> Out of curiosity are you using a "USB disk network" to move the data. That's a lot of data even for fast UK
> networks.
>

Yes, the imagery was collected using USB disks from CD:NGI's head
office in Cape Town. The first set was brought to London by
http://osm.org/user/Burger and the November updates were collected by
me in person.

/ Grant