|
I've downloaded and have a .osm file of the data (nodes, ways, areas) as it looked over a country in 2011 and in 2017. I have the changeset and history files as well. I'd like to create a map with a time slider showing contributions as they occurred. On a black country background, I'd like to display compounding changes in a subtle color (grey or white) and as the slider advances, for every iteration (be it month or year) highlight in a brighter color the changes/additions that were made during that time iteration (be it a year or a month). As it advances to the next iteration those changes are no longer highlighted but are added to the compounding overall changes that are grey or white. I think I would need to use the history and changeset files to derive a .osm snapshot of the nodes, ways, areas that were added during each iteration in time (2011, 2012, 2013...2017 if I was doing years). If I then combine them into one csv file could I then add them to say CARTODB and make this visualization? |
|
Your project is quite ambitious and you can't expect a complete solution to your question here. There are many ways to go about this. Here is one piece of the puzzle: You can use the time-filter command of osmium-tool to get each point in time you want out of the history file. After that any of the usual ways of rendering the data works and you can generate a map image for each point in time and the combine them. |
This seems to be the same question as https://gis.stackexchange.com/questions/253723/visualization-options-for-showing-changes-in-osm-over-time-for-a-country .
Yes I deleted that one. Edited it and posting here as I think OSM help forum is more appropriate.