# tlohde

the map room

A collection of maps, mapping projects, and map-related posts.

maps

A dark map of Lake Baikal. Titled: 'Lake Baikal' with subtitle: 'Age: oldest (25-30 million years) Depth: deepest (1,642 m) Area: 7th largest (Belgium + 1,033 km2)'. The bathymetry is coloured from dark black at the deepest through a purple-y gray to gray for the shallow regions. A colorbar has the 'dysphotic' and 'aphotic' zones roughly labelled. It spans latitude 52-56 N and longitudes 104-110 E. (approx). A dark, mostly black, subtle hillshade is applied to the surrounding landscape. The lake cuts a roughly diagonal line from the bottom left of the frame to the top right, and it is very narrow compared to its length. Credits at the bottom read: 'by:tlohde / GEBCO Bathymetric Compilation Group 2025 (2025): The GEBCO_2025 Grid - a continuous terrain model for oceans and land at 15 arc-second intervals'
A topographical map showing the Rembesdalskåka outlet glacier of Hardangerjøkulen ice cap in Norway. Elevation is depicted by gray contours and a colour ramp from dark blue (low) to white (high). Within Hardangerjøkulen, a dashed line denotes the extent of Rembesdalskåka. Across which are several black lines, each one with a year label (from lowest elevation to highest: 1989, 1993, 2000, 1973, 2017, 1991, 1985, 2019, 1966). Around the edge of the ice cap several mountain peaks are labelled. A scale bar in the top right indicates that the whole map is ~20 km across. Several lakes are shown in a dark blue. The title / legend in the bottom left reads: 'Rembesdalskåka Equilibrium Line'. Credits along the bottom read: 'by:tlohde / Copernicus Global DEM (ESA) / Raup et al., (2007) The GLIMS Geospatial Glacier Database / Fluctuations of Glaciers Database, World Glacier Monitoring Service / OpenStreetMap contributors'
A hexbin map showing density of vineyards across Italy. Map is titled 'Dove sono i vigneti?' The color scale goes from white through warm orange to dark red, with tick marks indicating that it is on a log scale. It is labelled Meno (less) and Piu (more). Credits in the bottom left read: 'by:tlohde / © OpenStreetMap contributors / Colormap: Bilbao by Fabio Crameri / Font: Prociono by Barry Schwartz'.
A map showing the bathymetry and sub-glacial topography across West Greenland. The topography is on a black to dark blue to light blue color ramp. Contours are drawn and 250 m intervals. There are many fjords and islands. Several fjords have regions where the depth is 1000+ m. There is a subtle hill-shade layer on top of the terrain. There are ~30 glaciers marked as small orange crosses, with their names written along side. The names are in Greenlandic, for example: Nunaarsussuup Oqquatungaani Sermikassak, Tassartooq, Sermikassak, Umiammakku Sermiat, Nakkala, and Kangilleq. The map is titled: 'Glaciers of West Kalaallit Nunaat (Greenland)' with the following text below: 'Changes to the Greenlandic language coupled with a history of exploration has led to many glaciers having multiple names. Greenlandic names are typically descriptive, whereas names given during expeditions are often say more about those on the expedition. For example, Rink Isbræ was named in honour of Hinrich Johannes Rink (Isbræ meaning glacier in Danish). Its Greenlandic name: Kangilliup Sermia, can be approximately translated to mean: The Eastern Ice.' In the bottom left the data sources are credited: 'Greenlandic Glacier Names by Bjørk, Anders; Kruse, Lisathe; Michaelsen, Peter (2015). https://doi.org/10.6084/m9.figshare.1449148.v2 & BedMachine Greenland by Morlighem, M. et al. (2022). https://doi.org/10.5067/GMEVBWFLWA7X. Date Accessed 24-11-2025.' & in the bottom right it reads : 'by:tlohde'
A map of northern Sweden, Finland and Norway. The coastline and border between the three countries has been drawn multiple times and different scales. The 1:110 million scale is much more angular than the 1:10 million scale. Bathymetry is shown off-shore. Lakes and rivers are also plotted along with a few settlements. The typeface of the labels and corresponding legend items mirrors the scale of the data plotted, with a more pixelated font used for the 1:110 million scale data, and a more refined version of the typeface used for the 1:10 million scale data.
Map titled: 'River Catchments of Scotland'. Distance from catchment boundary is shown as hillshaded topography and coloured using a blue-to-white colourmap. Large catchments, such as the Tweed in the Scottish Borders, Tay in Perth and Kinross, and the Spey all appear as large depressions in the landscape with their catchment boundaries appearing as ridges. The sea is depicted with a random scattering of blue-to-white dots. Credits in the bottom left corner read: 'by:tlohde / OpenStreetMap contributors / includes Crown copyright, Cefas 2023 / League Script by the League of Moveable Type'
A 3d model of mountainous terrain showing a sinuous valley with its surrounding peaks. Titled: 'Val di Genova, Parco naturale dell'Adamello-Brenta' credits: 'by:tlohde / Copernicus Global DEM (ESA)' Labelled peaks are: Cima Presanella (3557 m), Monte Mandrone (3283 m), Cima Lancia (2318 m), Crozzon del Diavolo (3018 m), Corno di Lago Scuro (3164 m) & Cimon delle Gere (3016 m)
Map of the British Isles showing the location of extinct volcanoes (unfilled black circle markers). and bedrock fault lines (orange lines). The coastline is shown in thick black, with a slight dropshadow. The map is coloured in such that the volcanoes are a bright orange/yellow, and the colour moves to a darker purple with distance from a volcano. The same colourscheme is applied at sea, however with reduced opacity. The title text reads: 'The ~~British~~ Volcanic Isles' with subheading: 'Volcanic activity across the British Isles peaked during the Paleozoic (539 to 252 Ma*), with the last significant eruptions occuring during the Paleogene (66 to 43 Ma). *million years ago'. A few key volcanoes are highlighted: Anton Dohrn Seamount (70-41 Ma); Erlend (58 Ma); Rum (60 Ma); Ben Nevis (299 Ma); Dundee Law (415 Ma); Arthur's Seat (299 Ma); Loch Na Fooey (490 Ma); Mynydd y Dref (450 Ma); Bardon Hill (570 Ma); Warboys (300 Ma); Gurnard's Head (400 Ma)
A simple black and white map with very few features. A single line of longitude at 52°30′ W and one line of latitude at 72°0′ N cross the image. Just north east of their intersection is the text: 'The marine-terminating Salliarutsip Sermia retreated 12 km between 2000 and 2025'. This text is written over two lines; is aligned south-west to north-east and has a gentle curve to it. At either end of the text are two thick black lines, each slightly curved and jagged, representing the terminus positions of the glacier. The credits in the bottom left read: 'by:tlohde / terminus positions digitized from Landsat 7 & 8 acquisitions on 26/8/2000 and 23/8/2025'
Map of Wales. Titled: 'Access to the Railways' The map is a proximity surface, with bright colors representing large distances from a railway station, and darker colors closer to train stations. Additionally the proximity surface is shown with illuminated contours giving the a 3d-ish feel, with the railways running along ridges, and places far from the network appearing to be at the bottom of a hill. The middle of snowdonia and a portion of the west coast are shown as being the furthest from the network. An annotation reads: 'Llangrannog the furthest village from a train station (in a straight line)'. At the top right some text reads: 'Platform Wales'. the credits read: 'by tlohde / OpenStreetMap Contributors'
A map of East Anglia, UK. No features have been drawn on the map, however the land is coloured from white to pink to dark pink depending on the depth of superficial deposits. The majority of the region is white, however there are some bands of pink and a few patches of dark pink, neart the Suffolk/Norfolk border. In the top right is a histogram showing the distribution of depths. The frequency is shown on a log-scale, indicating most areas have no deposits, but some have up to 100 m. The title runs downt the right side of the plot and reads: 'Depth of Superficial Deposits East Anglia UK' and is written in white with a large drop shadow in dark pink. The north sea / background is black, which makes the whole image quite high contrast. Credits along the bottom read: 'by:tlohde / ‘Contains British Geological Survey materials © UKRI 2025'
A black and white map of Western Europe. The oceans are black, as are the lakes, and rivers. The land is white, with some black stipples denoting the areas of higher ground. Country borders are not shown. Text in the upper right reads: 'From Calais (Fr) --> Orfu (Hu) via: Belgium where it rained; the Netherlands for (second?) breakfast; Germany where it was hot and I filled my thermos with ice cream; Austria for the only proper hill; and into Hungary for a swim in Lake Balaton.' The route taken is shown, along with the elevation profile of the route along the bottom of the image. At the bottom the text reads: '~2100 km / 13 days / 0 punctures' with credits: 'by tlohde / Copernicus Global DEM (ESA) & Natural Earth'
Map titled: 'Qikiqtaq 69°10ʹN 57°25ʹW, Kitikmeot Region, Nunavut, Canada' The island is irregularly shaped, with several larger bays/inlets. The island is covered with many, many lakes. The lakes have been coloured in a variety of blues. In the top left is a small histogram showing the distribution of lake areas, on a logarithmic scale: with mode of 0.01 km^2. In the bottom left is a map showing where Qikiqtaq is in the Canadian Arctic, above the rest of North America and to the west of Greenland. A scale bar in the bottom right corner is 25 km wide, indicating that the whole island is ~200 km across at it's widest point. Some text in upper right reads: 'here, lakes cover ~24% of the island and there are ~46 lakes per person'.
A map titled: Barnes Ice Cap, Baffin Island, Nunavut, Canada. The map is comprised of a Sentinel-2 RGB image satellite image showing the ice cap which is up to 60 km across and in excess of 100 km long. Surrounding the ice cap are mountains, some with snow covered peaks, others rocky, along with many bright blue lakes. Overlaid on top of the ice cap are flow lines indicating the direction of ice flow, and colored according to the speed of flow. The lines clearly show the ice divide in the middle of the ice cap. The color of the flow lines is on a logarithmic scale from 0 to 100 m/yr, as shown in the color-bar beneath the main plot. In the upper left is an inset showing where Baffin Island's position to the west of Greenland, and above the north eastern limit of North America. Image credits in the bottom left read: 'by:tlohde / (C) contains modified Copernicus Sentinel-2 data / NASA MEaSURE's ITS_LIVE (Gardner et al., 2025)'
Minimalistic map of France, showing a series of nested contour lines in blue and red. Blue contours represented the density of bakeries; red farms. Above the main plot, the longitudinal distribution of bakeries and farms are shown (with a prominent bakery mode inline with Paris), and to the right the latitudinal distributions. The map titled: Croissant Distribution (boulangerie & fermes), and is accompanied by the text: Spatial distribution* of bakeries and farms across France. *kernel density estimate. Image credits: by:tlohde. (C) OpenStreetMap contributors, Font: Borel by Rosalie Wagner. The font is nice and cursive
Graphic representation of Europe. The frame is circular, each country is depicted as a series of circles of decreasing size, tightly packed together. The title is: eur(o)pe. Credits at the bottom read: Encircled Incircles / by-tlohde / made with Natural Earth
Graphic representation of Iceland. The frame is circular, with a blue background. Iceland is depicted as a series of circles of decreasing size, tightly packed together. The circles are red. The title is ÍSLAND and the capital, Reykjavík, is also labelled. Credits at the bottom read: Encircled Iceland Incircles / by-tlohde / made with Natural Earth
a network of roads in grey, with another fainter network behind, shown with dashed lines
Map of Greenwich & Blackwall, London. Features are drawn in black, and the background is sepia. The River Thames is filled in with a series of concentric lines. Buildings are shown with grey hatching. The cable car across the Thames is shown as a dot-dash line, and is labelled Cable Car, and the under construction Silvertown tunnel is shown as a pair of dashed lines.
Mackenzie Distributaries. Illustration of a complex network of meandering, branching river channels. The rivers are shown in dark blue, with colours ranging from light blue to white away from the channels. Lighter colours denote elevations that are higher than the nearest river channel.
Map of the Baltic States, with a meandering route drawn on. A route is drawn in pink: Tallinn, Vormsi Island, Tartu, Suur Munamägi, Gulbene, Jekabpils, Riga, Kuldiga, Liepāja, Curonian Spit, Šiauliai, Trakai, Vilnius
Magyarország Oázisai. (Hungarian Oases) Bivariate choropleth map of Hungary on a black ground, with a dense hexagonal grid, where each hexagon is coloured by the number of springs (in blues) and the number of pubs (in orange/browns). Regional capitals are labelled.
On the left-hand side is a 4 x 5 grid of circular maps showing the city centres of each of the twenty regional capitals of Italy. Only polygons of parks and gardens (green), buildings (white) and piazzas (red) are shown. Above each circle is the city title, with the region name below. On the right-hand side is a map of Italy, showing the regions (in red) and the regional capitals are labelled in green. The whole figure has a black background.
On a black background are many many, small wiggly lines, the lines are coloured by the direction in which they go, using a circular colour map. If you know that the lines depict where water would flow over a landscape, and that the colours correspond to the direction, one can see how this does resemble terrain, with lower elevations and river valleys depicted as empty space, and ridges are where the lines of different colours meet. It is messy and quite abstract
a ridgeplot style map, showing the topography of the Parco Naturale dell'Adamello-Brenta, with a smooth colour ramp from pale yellow in the foreground to darker blue in the far-field. Along the right and left edges are names of Rifugi (mountain huts) and lines leading to its location in hills
A satellite image showing a few outlet glaciers in west Greenland. Two are labelled: In orange: Kangaasarssup Sermia (KS) and in blue Isortuarsuup Sermia (IS). An inset shows a close up of the terminus of IS where ice bergs can be seen in the lake.
Three subplots, the two on the left cover the same extent, and the one on the right shows a smaller area contained within. The top left shows change in ice veloicty (green=faster, pink=slower). There is no pink, and the intensity of green increases towards the glacier. In the lower left the rate of surface elevation change is shown where red=thinning, blue=thickening; much of the glacier has thinned with the greatest thinning near the terminus. Two water bodies indicate some increases in elevation, however dh/dt values over water are not to be trusted. On the right, a close up satellite image of a glacier terminus with multiple terminus traces shown for a 6 year 2014-2020 period. Some terminus retreat is visible at the northern end of the glacier, near some grounded icebergs
A map of the Cairngorms national park. Black background with white national park border. Within the national park the terrain is represented by colors ranging from black through dark purples to bright orange. Brighter colours represent regions that are 'more visible' than darker regions, as these areas can be seen from more summits. The resulting sum of viewsheds bears strong resemblance to the underlying topography.
map of north western Hardangerjøkulen, Norway. The map is in black and white, and has been made to look like it was photocopied.
A map of all the lakes in Finland, with the caption: if you go skydiving in Finland you have a 1 in 12 chance of getting wet

projects

bagging

A leaflet app for displaying all the Munros and Wainwrights that I have, and have not climbed, and the route taken along with some summary statistics.

shadow chasing

A small leaflet app for displaying the path that would be traced were you to follow your shadow. accompanying post

posts

euclidean cities 14/05/2026

finding the most (and least) euclidean capital city

#dataviz#maps#project#python#science
deep thoughts 30/03/2026

thinking abouth bathymetry

#dataviz#maps#project#python
2 × 4⅓ 27/02/2026

canine seizures & jury duty

#izgi#links#maps#thirteen-thirds
process 23/11/2025

a tortuous cartographic practice

#dataviz#maps

12 more posts can be found under the #maps tag