Many thanks - this is very helpful - not least your indication that I've chosen a difficult starting point, and may not be so much of an idiot as I thought !!
Your suggestion re "fixme" really resolves one of the worries that I had on the identification of areas in particular. Interesting that the Bing area that I had initially thought to be woodland is shown as cleared land on the later world view image, and I should perhaps identify it as cultivated land. Best Wishes Andrew On 14 January 2015 at 21:56, althio althio <[email protected]> wrote: > Hi Andrew, welcome to HOT and our mailing list! > > > Worldview-2 ... name given is Digital Global - is this one and the same. > > Yes. "The imagery [...] is from Digital Globe’s WorldView-2 satellite > taken on February 20, 2014." > This gets confusing when sometimes we refer to the provider and > sometimes to the satellite. > > The imagery handling is quite complicated and has been modified over > time in this particular project. > So you picked a tough one for a starter but brace yourself and follow us! > Everything related to the imagery is detailed for this project in the > very first tab "Description". > > For your convenience I copy here two sets of explanation regarding the > imagery instructions. > [from a previous thread with close topic at: > https://lists.openstreetmap.org/pipermail/hot/2015-January/007016.html > ] > > >>> 1. Start editing a task. > >>> 2. Load the Bing imagery (now 2013 images). (In JOSM do not use the > alignment database plugin settings, they are no long needed for Bing > imagery) > >>> 3. Make sure some buildings and roads are mapped correctly using the > Bing imagery. Move or map some new ones to match Bing. > >>> 4. Then load the WorldView imagery (2014 imagery). > >>> 5. Background align the WorldView imagery to match what you just > mapped in using the Bing imagery if needed. > >>> 6. Carry on mapping using the WorldView imagery after you have aligned > it or checked its alignment. > > >> As a summary of what Blake explained, you should use both imageries for > project #591. > >> 1. First use Bing as a reference for alignment and do the first pass > with most of the mapping; > >> 2. Second use Worldview - to be aligned on Bing - as it is more recent. > Use it for an update pass mapping (it should be a few more or less > buildings mostly). > > > With this in mind, let me come back to your questions. > > > When I converted to JOSM as loaded, on one > > occasion I moved the bling image to co-incide with my plotted items, and > > adjusted the placing of these areas. Are both of these actions valid? > > In this project, Bing imagery is the common reference for alignment so > you should not move it. > I think michael63 helped you already with your square. > Do not try to align on GPS traces even if you can find one, as we are > interested in homogeneity. > Everyone aligned to Bing is more useful. > > > >> if you are not sure about the nature of an object do not place any > questions in the name tag, use the note tag for this purpose > > The note tag is well suited indeed for a remark concerning tagging. > Another common practice is fixme=* for instance "fixme=confirm if > school and add name" or "fixme=confirm if farmland". > These "fixme" tags really stands out with the map-style Humanitarian > that can be loaded in JOSM. > Many experienced HOT mappers and validators use this style. > > > Thanks everyone and keep going! > -- Andrew Patterson The information contained in this e-mail and any files transmitted with it is confidential and intended for the addressee only.
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