Sunday, 10 January 2021

Poster catalogue

[ Update 2: Anaglyph 3D pops up Central Cambridge halfway down under Other Areas

Update 1: added four effects to enhance relief maps on mountain areas at the bottom ]

Last month's Story-in-a-map reminded me I created a number of map posters, as a mean to reach out to the community, where prints are better in town hall or small group presentations, as well as wall art.

East Anglia

Sea Level Rise Models

These were introduced in Medium and expanded in a story map. But maps' story-telling capacity in this story map resulted in a catalog of print maps. So-called papercut style highlight the progress of sea level rise models in North Cambridge and East Anglia.

  • A4 96 dpi here (656 Kb) for low resolution leaflets (1:125,000 - ½ in./mi.)
  • A4 300 dpi here (4.12 Mb) for high resolution leaflets (1:125,000 - ½ in./mi.)
  • A1 300 dpi here (22.2 Mb) same as OS Landranger (1:50,000 - 1¼ in./mi.)
  • A0 300 dpi here (36.4 Mb) same as OS Explorer (1:25,000 - 2½ in./mi.)
  • above papercut map of all of East Anglia A4 portrait 300 dpi (9.26 Mb) here
  • blue tone papercut map of all of East Anglia A4 300 dpi (8.98 Mb) here
  • blue tone papercut map of N Cambridge A4 300 dpi (4.09 Mb) here

Affected Areas

Parishes affected by sea level rise models to support submissions, and storied here to promote situational awareness, get 120dpi A0 (11.5 Mb) here and A4 (1.2 Mb) here:

Pirate map for fun, get the 150dpi A4 (1.5Mb) here:

Cambridge Colleges divestment campaign guide, get the 150dpi A4 (1Mb) here:

Cottenham inundation risk

Flood risk, infrastructure & topography showing at-risk areas, all PDFs handouts for local village council engagement storied here:

  • get A0 96dpi regional above poster here
  • get A4 96 dpi village top left poster here
  • get A4 96 dpi village top right poster here
  • get A4 96 dpi village bottom left poster here
  • get A4 96 dpi village bottom poster here

Digital Terrain Models

DEFRA offers almost countrywide coverage in 1 & 2 m. resolution digital terrain (topography) & surface (+ building + vegetation) models plus 25cm. along rivers & levees.

  • DEFRA 1m. Digital Terrain Model in A4 landscape 300 dpi (5.26 Mb) here
  • DEFRA 1m. Digital Surface Model in A4 landscape 96 dpi (7.28 Mb) here

Topography & Geomorphology

As mentioned in this story map, "topographic inversion" is an optical illusion that relief appears inverted unless it's lit from the NW. And since most landscape is lit from the South in the Northern hemisphere, air photo and satellite imagery are prone to such 'inversion'. That led to this "upside down" poster to restore "right side up" relief, get the 150dpi A4 (2.28Mb) here:

@StaridasGeo blog post post showed how to get "right side up" via edge detection & assigning 247° azimuth 47° elevation suitable for these latitudes, get the 150 dpi A0 (18.74Mb) here:

Other areas


A discussion with @SRawlinsonPhoto and @John_M_Nelson led to the Skelwith Fold area of the Lake District using Blend mode in this Story Map. with added Mist effectGlass arrows & Illuminated text:

click to enlarge, get full size

Top is Esri multi-directional hillshade and bottom is DEFRA 2m DTM, both with Esri terrain for misting and world imagery for land cover:

click to enlarge, get full size

Central Cambridge

Another @StaridasGeo's blog posts used Blend mode to create Anaglyphs: while he used global scene on topography, here is local scene on building elevations I had already used. As mentioned in both blogs, you need 3D specs w red and cyan, cheap cardboard ones available online - you can try also cross-view - here it is with Castle Hill atop and Magdalene Bridge near centre, showing OS buildings & background, & DEFRA topography; view this story map for how this helps situational awareness:

click to enlarge or get it here

Rest of the World

Here is a collection using this Esri style posted in this story map, with added Mist effectGlass arrows & Illuminated text:

Banff Nat. Park, W CAN, click to enlarge, get full size

Notice that in contrast to the Po Plain in the arc of the Alps below, the W CAN Prairies NE of the Rocky mountains show no misting: that's because the Foothills are a mile high!

SW Alps, click to enlarge, get full size

W Pyrénées, click to enlarge, get full size

Jones Sound, CAN Arctic, click to enlarge, get full size

Volcanoes, NE Tanzania, click to enlarge, get full size

Thanks John Nelson & Spiros Staridas for twitter discussions, & John Nelson carto tips.

Sunday, 27 December 2020

Coronavirus update - Part XII

[ Update: NHSx cases and newly corrected ONS deaths show no sign of letting up... ]

Since our previous update, a third national lockdown (tiered but effectively so) resulted from the numbers that just keep increasing, as well as a second strain of the virus appearing but not split out in NHSx stats. That is patent in the comparative graphs below:

Friday, 18 December 2020

Digital Nomads and Digital Divide

 Here is the Parliament   f i n a l l y    addressing the challenges posed by the pandemic, with a fairly comprehensive review of the facts they gathered.

Sunday, 13 December 2020


[ Update: see Update #7 in this story map on how to address topo inversion (#6 is this) ]

 While I have written a few story maps, the #30DayMapChallenge last month has taught me to tell a story in a single map. The amazingly detailed DEFRA digital terrain model has already been used here (go to Update 1) in the Cambridge area of East Anglia. So here is a synoptic view of South Cambridgeshire, with its story in the box. 

Thursday, 19 November 2020

Coronavirus update - Part XI

[ Update 1: Still no sign of the second wave abating and deaths on the increase again
  Update 2 : next installment shows how the second wave numbers just keep growing ]

Further to our last blogpost, the second lockdown resulted from / is reflected in both sharp increases in cases passing 1.5M, and marked ones in deaths passing 70,000 and on the increase again

Thursday, 29 October 2020

Flood preparedness in East Anglia as a Story map

This is the third in a series of Story Maps after Sea Level Rise models in Cambridge, East Anglia and on Local Flooding in Cottenham immediately north. Full page here.

Monday, 19 October 2020

Another Story Map on local flooding this time

[ Update: the next blog post expands on building situational awareness for flood response in East Anglia ]

Following my second-last post on a story map about flooding and sea level rise in Cambridge, here is another one about surface effects of flooding in my home village just north of there. Enjoy!

Friday, 16 October 2020

Cornavirus update - Part X

[ Update: MSOA data only rolling weekly on NHSx site here or via the PHE API here
Update 2: next installment shows further marked increases in the second lockdown ]

 ... A lot has happened since the last update: not only may we have a second wave as seen in the bottom left-hand panel below, but also NHSx posted new Ward-level data in a format ready-to-use for coxcomb maps.

Saturday, 26 September 2020

Sea Level Rise (cont.)... and a Story Map!

[ Update 3: see a follow-on story map next. on local flooding effects just north of there...
Update2: thanks to Esri(UK) and Esri folk who helped my return to 3D web mapping! 
Update 1: check Sea Level Rise model affecting Central Cambridge area on YouTube ]

Let's wrap up Sea level rise web map, poster and pirate map: having started with a simple map of Cambridge University Colleges indicating how deeply they would be submerged in a sea level rise scenario, let's map the buildings in 3D and show how far raised sea levels would submerge them! But first let's start with a flood risk map and finish with a combination to help with situational awareness. 

Monday, 7 September 2020

Sea level rise web map, poster and pirate map

[ Update 3: action in Update 1 resulted in Trinity Hall declaring divestment... hurray!
Update 2: the next post rounds this up with a Story Map that includes flood risk
Update 1: here is a video of the action mentioned below, re: colleges divest from oil ]

An Extinction Rebellion Cambridge action, demanding colleges divest from oil investment, led to a simple yet arresting idea: map the level below 12 m. sea level rise each college would be under, if climate change we left unabated, as a means to help convince them of the consequences of climate inaction.