Missing Maps Stirling

Missing Maps is a great initiative which encourages the mapping of areas that are crucial to the efforts of humanitarian organisations. Maps help people on the ground to focus their efforts and simply find people in need.

BUT:
Isn’t everything mapped already?
Is a question I hear often. While a valid one. Yes, all the streets that I use regularly are mapped on both Google Maps, and OpenStreetMap. But the case is not the same for the places where our efforts are really needed. For the undeveloped parts of the world, where Medecins Sans Frontieres are making a real impact, the case is not the same. We have aerial imagery, but we do not know where the towns are, where the roads go, or population estimates.

NO:
Organisations rely on Missing Maps to deliver their life saving help. Not to deliver aide but to find people requiring it:

  • The American Red Cross
  • The British Red Cross
  • Humanitarian OpenStreetMap Team
  • Medicins Sans Frontieres

  • Come along:

    If you are in Stirling or in the area, please come along. The event is free, and being held at the Smith Museum, on the 27th April, 6pm onwards.

    If you are attending if you could sign up so we know attendee numbers:
    https://www.eventbrite.co.uk/e/missing-maps-stirling-tickets-24456498044

    If you want to share the event we also have a FaceBook page:

    Event:
    https://www.facebook.com/events/987777994681557/

    Hope to see you there.

    Mapping an Integer

    So just before Christmas I received my own “hand-crafted”, “unique”, and “hella-beautiful” integer. From Brooklyn Integers: 404578811.

    http://www.brooklynintegers.com/int/404578811/

    I was not initially sure what to do with it. But I had some time while waiting on points to appear in polygons so I though I would map my integer.

    So we have a few combinations for co-ordinates:

  • 0, 404578811
  • 4 , 04578811
  • 40 , 4578811
  • 404 , 578811
  • 4045 , 78811
  • 40457 , 8811
  • 404578 , 811
  • 4045788 , 11
  • 40457881 , 1
  • 404578811, 0
  • And of course:

  • 404578811, 404578811
  • I have to say these do not translate very well into my current de facto co-ordinate system of British National Grid (0, 404578811 and 404578811, 0 and 404578811, 404578811 not shown).

    BNG_no_good

    Luckily we can try some alternatives. Smathermather had a great post about mapping Null Island/Archipelago, so we can re-use some code. To map our integers to a selection of CRSs.

    We use the EXCEPTION, because some of the more awkward co-ordinate combinations cannot be translated back to EPSG:4326 without causeing a SQL error.

    Then we can create our our tables.

    Replacing 404578811_404578811 as needed.

    Mapped:

    by_co_ord

    By CRS:

    by_crs

    4,04578811:

    4_04578811

    Album of the rest.

    It really shows how fragmented the EPSG codes are for New Zealand, and to a lesser extent the US.

    Every Person in Scotland on the Map

    Full size.

    The mapping process creates a random point within a building shell inside of a postcode area, which is repeated for every person in a postcode. This is in contrast to a simpler process, which does not take into account buildings at all, working simply with postcode areas. This can be seen in my previous post: Population of Scotland Mapped

    Inspired by:
    The Guardian – Every person in England and Wales on a map by Chris Cross

    Based on the 2011 Scottish Census population data.

    Data from the National Records of Scotland.

    Combined with the Ordnance Survey, Open Map product.

    Rendered with: QGIS tile writer python script.

    Forth Road Bridge Closure Impact on Drive Times

    In honour of the Forth Road Bridge re-opening completely. I created a map of the impact it has had on drive times from Edinburgh.

    This is based on the OS Open Roads Product, using pgRouting, and network generated using the guide from Ross McDonald.

    This does not take into account the increase of traffic on the other routes, or traffic in general. Would be interesting to see a real impact map from one of the major navigation providers.

    Drive time with and without the forth road bridge

    Difference the forth road bridge closue caused map

    Event: Historic maps of the Stirling area

    Putting Stirling on the Map

    Monday 29th February 2016 at 7.30pm in the Smith

    Paula Williams, Curator of Maps, Mountaineering and Polar Collections, from the National Library of Scotland will talk about four hundred years of mapping the Stirling area, illustrated with maps from the NLS collection.

    See the Stirling Local History Society for details:
    www.stirling-lhs.org/blog/historic-maps-of-the-stirling-area

    And the Flyer.

    Highlighting Selections in QGIS

    I have been working a lot with points recently, and one thing with the default selection highlighting in QGIS is that selections do not really stand out. This is especially true with point layers.

    A bit of an extreme example, but there are 15 points selected in the middle of this image.

    hard_to_see

    However, we can remedy this with the Expression Plus plugin (by Nathan Woodrow) and a rule based symbology.

    plugin

    This plugin adds a great function: isselected()

    With this we can easily create rule to symbolise features that are selected.

    The rule for symbology is as follows:

    QGIS 2.12+:

    QGIS 2.8:

    So we can see that 2.12 has added a slightly more dynamic way of applying the symbology.

    symbology

    We can now slightly more easily see our selection.

    more_visible

    But one final setting. With symbol levels we can really make the selections pop.

    symbol_levels

    Symbol levels can be set from the bottom right of the styles tab, through rendering order. We simply want out selection to have a higher number than the other symbologies. Thus being rendered in a later pass and appearing on top.

    final_selection

    Much better.

    Mapping Google Location Data

    A cool python script has been created that allows you to easily convert your google location (Takeout) data into a shapefile.

    You can get your data from: Google Takeout
    And you only need the “Location History – JSON format”

    The conversion python script can be downloaded from: GitHub

    The python script requires GDAL and its python bindings, but can be easily run if you installed QGIS using the OSGeo4W installer. From the advanced installer, under the Lib section.

    instruct

    Then using the OSGeo4W Shell.
    shell

    Run the command:

    Example:

    Then just style it in QGIS as desired.
    GoogleTakeOut

    Mapping Glasgow Districts

    Lets map the districts/regions/neighbourhoods/suburbs of Glasgow. The divisions of a city can be hard to distinguish, there are no hard boundaries between regions and these can be dynamic over time. Where does the West End begin? As soon as you cross the M8, or later? Where does the West End end? Before Partick, halfway through, or well past Scotstoun? Have your say!

    People Make Glasgow, help define its boundaries.

    Start mapping!

    This was done successfully in Boston: Bostonography – Neighborhoods as seen by the people.

    Although Boston is a significantly easier target. Their map covered 21 different neighbourhoods. According to Wikipedia, Glasgow has at least 145 districts.

    This will only be significant if we get a good number of responses. So please feel free to share!

    Made possible by: Nick Martinelli from extent(PNW). Code on GitHub.

    Map Glasgow’s Regions.

    The Great Polish Map of Scotland Revisited

    A lot of progress has been made since my last visit: Visiting the Great Polish Map of Scotland

    This time I had a bit more time, staying overnight with the very accomodating girlfirend at the Barony Castle Hotel. The steak was excellent, but the sauna was not very hot. Overall a good experience though.

    PANO_20151031_145802

    PANO_20151031_145722

    PANO_20151031_145635

    As you can see from the photos restoration works are in full progress.

    IMG_20151101_110954

    And dontains can be made to the worthy cause at: MapaScotland.org

    IMG_20151031_152433

    For a view of the way up to the map, see my first post on Mapillary: