(Auto comentarios traducidos por traductor Google, lo siento si la traducción es malo)

Excelente trabajo en la ciudad hasta el momento. Una cosa que noté fue que sin embargo tiene muchos caminos que se cruzan entre si, pero no se conectan. Es necesario agregar un nodo en cada intersección, donde el cruce de caminos para que se conecten a unos de otros. Sin este software de enrutamiento de conexión no se dan instrucciones adecuadas, ya que no sabe que las vías de hecho no se conectan.

Aparte de eso, mantener el buen trabajo. :)

-Buck

The JOSM filters work for data you have already downloaded but don't allow you to choose what you download in the first place. It would be nice if the XAPI servers had functionality that would let you download a subset of the data, I don't think they currently support this.

For example if you ask for the road layer you would get highway=*, cycleway=* and several other things. Asking for the water layer would get you waterway=*, natural=water, landuse=reservior, etc.

This would let people who are working with only one kind of data (perhaps you are cleaning up the lakes/waterways over a large area) and you only need a subsection of the full dataset.

Using the layer download you put less strain on the servers, and equally importantly, your editor doesn't slow way down because you have thousands of nodes for buildings and roads which even if you filter out, still slow down the editor needlessly (assuming you are working on the waterways as given in the above example).

Also, XAPI servers limit your download in two ways, by the size of the area you query and the number of objects in the resultset. By allowing you to download only some subset of the data you may be able to download a larger area since you will not be as likely to hit the object count limit as you are not asking for the portions of the data you don't intend to use.

-Buck

Also a handy trick in hunting down source info for photos is to use http://www.tineye.com/ to try to find the original image. You give it an image file, or the URL to an image and it will find other instances of that image on the web (I think even if they have been rescaled, re-compressed, etc it will still find them).

But yes, properly documenting stuff is definitely the best course of action, tineye is just for when it is not done right originally and you want to "set the record straight".

-Buck

Welcome to the project. Let us know if you need any help with the editing process if you see things you can add. OpenStreetMap is built entirely by individuals contributing their own knowledge to the map, the more people we have contributing, the better the map will be.

-Buck

There are a lot more things rendered on the map than are shown in the key. The main goal of the project is to _build_ the map, rather than just _display_ a map so the map on the main page doesn't really get as much attention as it should.

If you are wondering what a particular feature is you can zoom in on it and then look at it in the editor to see the tags on the object. There are also other sites which display data from openstreetmap and do a better job of making a map since that is their main goal.

Our map is created entirely by volunteers, and you are welcome to join in in adding things to the map. If you are interested there are many places to learn how to contribute. We need local mappers all over the world since the best people to map something are the people that actually live there.

-Buck

Adding source=survey is also a common thing to do with ground verified stuff. That should also help keep people from changing it if the ground is different than in the photo.

Ultimately the best source of information depends on a lot more on whether it is just imagery vs GPS. Ground truth is the only source of much information and good GPS traces give you positions well, but detailed road and building shapes are gotten better from properly aligned imagery (if available).

-Buck

Welcome to the project. We are always glad to have more mappers working with us. Please make sure that anything you add though is not from a copyrighted source. I am not sure what the policy of English Heritage is regarding their information but we have to be careful to only use out of copyright sources, sources we have permission for, or (best of all) information gathered directly by our own mappers.

One of the best ways you can help the project is by ground-surveying your own neighbourhood to add points of interest, like businesses and schools, and also to add addresses of buildings that are traced from satellite imagery (we have permission to trace from the Bing imagery that you will find in the editor). If you don't have a GPS the http://walking-papers.org/ website will let you print out maps you can write notes on and then the map can be scanned and uploaded to the website to trace over in the editor.

I hope you enjoy working on the project, and don't be afraid to make changes, but the copyright issue is one we have to be very careful of if we want the map to remain freely useable by everybody.

-Buck

The better thing to do with something like this is to leave the object in the database, but mark it as abandoned, disused, or demolished. The wiki pages for abandoned and demolished give a bit more detail on how to use them. I think there is a tag specifically for abandoned runways as well, however I think that is more for runways that are still there, but not used.

Not only will leaving the object in the DB marked abandoned prevent people from re-adding it in the future, but it also makes a useful resource as well since it is sometimes useful to know where things used to be. A good example is abandoned railway lines, since even though the rails are disused/gone the railway embankment often remains and it makes a useful landmark, and may be used for other things as well. I think Britian has turned many former railways into bike paths.

-Buck

In looking at your edits to this building I see you are trying to add HTML code into the 'source' tag for the building. The source tag is for the source of the information you used to add the building to the map, not for 'source code' for HTML markup and the like.

The openstreetmap database itself is just for the raw mapping data, i.e. the building's location, its address, if it is a business, etc. Anything else, like html forms, etc, should be done using a separate system built on top of the openstreetmap data, rather than being integrated into the database itself.

-Buck

Although it won't make the image clearer, the JOSM editor will let you zoom in as far as you want to (the online editor Potlatch only lets you zoom so far). This may or may not help you though, depending on what kind of imagery is available there.

If you don't have a GPS there is also the http://walking-papers.org/ website. This will let you print out a map so you can draw on it, then you scan it back in and the QR code on the image tells walking papers where it is. You can the load it as an "imagery" background layer in the editors for entering your information back in.

-Buck

You can re-align the imagery in potlatch. In potlatch 1 (probably the same in 2) you hold down the spacebar and then drag the background to its new location.

As for your question about Google, I really don't know. I think its pretty borderline, and I confess I've done similar things when working with imagery from the ISS. I used the ISS imagery as a source for what I was tracing but wasn't sure is some white blobs were oil tanks, I then confirmed that on google, although I can't remmeber if I ever did go back and enter them or not.

I think all in all it's best to try to stay away from google as much as possible, but it is definitely a grey area that you are referring to.

-Buck

I wish you the best of luck with that. I have seen the work done in Kibera and Mathare and have been very impressed with the maps made there. I am glad to see the skill being put to use elsewhere in the area. If there is Hi-resolution imagery available I can help you by doing tracing work (I have done a lot in Africa already) so that if you get a chance to do some surveying your time can be more effectively spent on gather "on the ground" info, rather than just doing the busy work of tracing roads/buildings.

Send me a message if there are any areas you would like traced. I will check back on this diary entry, too, to see if you respond, but the messaging system is more reliable since I am less likely to miss messages sent that way.

-Buck

Welcome to the project. Let us know if you have any questions about how to edit things or about any techniques you might employ to improve your mapping.

I see someone has traced a lot of buildings in the area you have been editing, but they do not have addresses. I have been using "Audio Mapping" to gather addresses in my hometown of Fargo, North Dakota, USA, and it really improves the map. You might also check out "walking papers" which allows you to print out a map, then go out and draw on it, then when you scan it back in it automatically gets made into an imagery background that you can use in JOSM (and Potlatch as well I think). Links to both techniques can be found below. I have used both techniques and have found the audio mapping to be much more effective for gathering house numbers, but walking papers is useful for adding buildings not visible in sat-imagery as well as other things like trails, car parks, etc.

osm.wiki/Audio_mapping
http://walking-papers.org/

-Buck

Excellent work. You are welcome to pop over to North Dakota and do our highways next if you want. ;)

-Buck

For your first question there is: osm.wiki/Key:lit

I don't know about the rest though.

-Buck

Welcome to the project. I see you have done many edits so far, and look forward to many more; keep up the good work. Let us know if you have any questions about the project, or about better ways to do your mapping.

-Buck

You can put the name on the map. Just zoom in to where the road is, click the "Edit" button at the top of the page, then click on the road to select it, and type the name into the field on the left sidebar, then click save. You should see the map update itself in the next few minutes with the new name. That is the whole point of this project, anyone, including you, can fix the problems they find.

-Buck

There is a russian blog post just a bit later than this one discussing this issue. The comments that are there so far seem to say that a rollback of the import is the best way to handle this and I would agree with that. I think the best way to handle this would be to import the data into a separate database and then render tiles of just that data. People can then use those tiles to get street names in conjunction with tracing/gps mapping (which seems to be about the only thing useful in this dataset).

It looks like the city center has better data then the areas around the edges. If this was from the import then that may be useful as well but the better data may be OSM stuff (not sure where it comes from).

I think that the rollback would be a much better way to go about it as it would likely take more work to "clean up" this data then to just make new data ourselves. Anyway, just my two cents.

-Buck

Here is the advanced instructions for relations in JOSM. I have not done much with them myself so I can't help you specifically, but I think the "relations panel" is what you need to use.

osm.wiki/JOSM/Advanced_editing#Relations

-Buck

By the way, welcome to the project. :) I didn't mean to scare you with the previous post, it is just that Google have made it very clear we can't use their stuff so I wanted to answer your question.

If you enjoy doing tracing work of satellite imagery, you should also check out the HOT team (Humanitarian Openstreetmap Team). The HOT team tries to map areas that are affected by war, natural disasters, or other places where good maps would help the humanitarian response in the region.

-Buck