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Projects
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OSM2Go uses projects to organize the work. This happens for
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mainly two reasons:
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1. The world is too large to be handled by a handheld device, so the
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concept of projects breaks the world down into little pieces a user
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is working on.
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2. A handheld device is likely not always online. Thus changes are done
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locally, stored in the project and uploaded/synched at a later time.
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A project consists of several parts:
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- The project file itself containing the projects name, the geographic
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area it refers to and information required to up- and download data.
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- The osm file being the information downloaded from the openstreetmap
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servers and containing a snapshot of the state of geographic area
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specified in the project file at the time of download. The osm file
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is never touched by osm2go unless it is overwritten by a newer version.
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- A diff file containing the changes the user has made to the data in the
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osm file and which has not yet been uploaded to the osm server.
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Uploading
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The upload is a delicate step as this actually alters the openstreetmap
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main database. This also is the only step that alters it, so unless you
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perform an update you can play around with the map as you want without
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risking to destroy anything.
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So you actually have decided to perform an upload. You've changed some
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ways or nodes. These changes are currently in the project diff file
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and you may actually leave and restart osm2go without leaving those
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changes. Selecting upload from the menu will first give you a raw overview
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of what will happen. You'll be told how many way and nodes you've changed,
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how many have been deleted and how many have been created newly. Currently
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the "relation" row will always contain zeros as osm2go does not support
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relations yet. But please take a short look at the numbers presented for
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ways and nodes. Do they make sense? Do they e.g. indicate that something is
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to be deleted, but you didn't delete anything? Please don't go ahead then,
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but try to figure out what happened.
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If everything looks reasonable, then enter your openstreetmap account
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data into the username and password fields and click ok. A new window will
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open containing a text buffer. This is the upload log. It will record
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basic information about your upload and may be especially useful if something
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goes wrong. Lets hope you entered your username and the password correctly.
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Then the upload should succeed. This usually only takes a few seconds.
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If your upload went fine and you actually changed data on the servers
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database, osm2go will then re-download the entire project area from the
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server. It will free the map and redraw it on basis of the newly downloaded
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data which now hopefully includes the changes you just uploaded. You should
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see the same map as before, but this time it comes entirely from data stored
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on the main server. Congratulations, you just contributed to the openstreetmap
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project!
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You can go ahead and continue editing and uploading. OSM2Go will take care of
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your changes and make sure everything is stored until you upload it to the
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server so the server takes over the maintenance of your contributions.
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Getting started
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Getting started with osm2go is not dangerous since osm2go works offline
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most of the time and does not touch any data stored in the openstreetmap
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database unless being asked to do so.
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Parent Directory
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Revision Log