Oberon Ohana
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logicalmap.org
Oberon Ohana
@logicalmap.org
2 followers 4 following 110 posts
Author of Logical Map: Data and Material Flow Visualization
All software/docs public domain CC0 #FOSS
ORCID: orcid.org/0009-0001-9575-0642
📐 logicalmap.org
💾 floppypng.com
✍️ sysadmintools.com
📙 orng.org
🧑‍💻 systemsa.net
"Thou didst not see what I saw, Robin"
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logicalmap.org
Kind of captain obvious. Rome never ended. #PhilipKDick #PKD
February 9, 2026 at 6:47 PM
logicalmap.org
My own peak complexity is likely this particular entry. At the time I felt it was a key insight, and spent quite a bit of time pinning it down in words and pictures, but I've lost comprehension, like a boat with Scully in it moving further from the shore.

orng.org#art1216
February 9, 2026 at 3:32 PM
logicalmap.org
I created a diagram of #imcr (Using Graph Stack Text and Logical Map tools, of course):
T=WebSocket Transfer, S=Sort, P=Public Key, I=Index, 1=1st Tier, 2=2nd Tier The index has the state of the local node tiers. FPNGs get dumped into tier 1, which triggers discovery of live nodes and transfer of the index. The local nodes respond with what is missing in their index. The index includes both tier 1 and 2; however, transfers always go directly into tier 1 at first. The sorting process verifies the signature with the submitted public key, and sticks it in tier 2. Tier 2 is both an archive and the latest version. If the "lmp" domain updates the FPNG, it goes out to all nodes via Tier 1, and eventually gets processed into the latest prod snapshot.
February 7, 2026 at 8:14 PM
logicalmap.org
Quick status vid on Logical Map Technical Reference. I'll roll in "Idempotent Monte Carlo Replication" #imcr as I figure it out. #lmtr
February 5, 2026 at 8:05 PM
logicalmap.org
This amazing piece of hardware has survived decades. It was considered garbage in 2004. It has an old Fujitsu/Siemens Pentium 3 motherboard that just won't die. I'm using it as an edge case to test my software. The web apps fail because it won't even do SSE2, but I can extract Floppy PNGs just fine.
A close-up view of the internal components of a computer case, showcasing a motherboard and various peripheral devices. The motherboard includes multiple integrated circuits, capacitors, and a cooling fan with a "JT" logo. Attached to the motherboard is a smaller green circuit board marked with "99230-000" and "UP300-1". In the background, there are a hard drive unit with a circular label, a dual-fan component, a gray power supply unit with a yellow sticker, and numerous multicolored cables connecting the parts. Provided by @altbot, generated privately and locally using Qwen3-Vl:30b 🌱 Energy used: 0.097 Wh
February 4, 2026 at 7:38 PM
logicalmap.org
What gives me the right to comment on complex data and material supply chains? Well, I started building this homebrew #z80 computer in 1980 using point-to-point solder. #retrocomputing #homebrewcomputer #blinkenlights
A detailed view of two sections of electronic circuitry. The top section features a digital display showing “0 0 5 5”, numerous colorful wires (red, yellow, green, blue), a large transformer with a coiled component, and a circuit board with various electronic parts. The bottom section shows a perforated board with multiple red LED lights, integrated circuits, resistors, a black component with gray ribbon cables, and a brown perforated board. A label on the bottom section reads “RD WR Rdy Zay Flat M. Hargreaves” and includes two small blue connectors. Both sections display dense wiring and vintage electronic components. Provided by @altbot, generated privately and locally using Qwen3-Vl:30b
February 4, 2026 at 5:12 PM
logicalmap.org
not resilient
bad gateway error for resilience.org
February 3, 2026 at 4:24 PM
logicalmap.org
My current favorite version of this meme:
Alt text nested astronaut / earth with gun always has been meme python next to earth, saying "wait, it's all abstraction?" Python, c, assembly, machine, code, transistors each pointing a gun in nested fashion going out from the first, all saying "always has been"
February 2, 2026 at 4:15 PM
logicalmap.org
There is something satisfying about listening to XMMS with a Winamp classic skin on my 1U edge case machine for #lmtr .
A computer desktop screenshot displaying multiple open windows: a SeaMonkey browser window, a Winamp media player window, and an xterm terminal window. The SeaMonkey browser shows a tutorial on Electron v39.2.7-linux-x64 with commands like "/tmp$ unzip ~/Downloads/electron-v39.2.7-linux-x64.zip", "/tmp$ mkdir resources/app", and JavaScript code starting with "const app, BrowserWindow = require('electron/main')". The Winamp player displays "1. Disinfo Machine - Shared Cultural Cognition" in its playlist with a timer reading "287:12". The xterm terminal shows "user[@]computer:~$ scrot ss.png" with prior output "Setting up scrot (1.11.1-1.0ant1) ... Processing triggers for man-db (2.11.2-2) ...". The taskbar at the bottom includes app icons, a clock showing "07:44:25 AM", and window titles like "XMS - 1 ...", "Local Floppy ...", and "Winamp". Provided by @altbot, generated privately and locally using Qwen3-Vl:30b 🌱 Energy used: 0.164 Wh
February 1, 2026 at 3:52 PM
logicalmap.org
#CharlesBabbage #AdaLovelace
Ada Lovelace wrote this about Charles Babbage’s computer in 1843: “The Analytical Engine has no pretensions whatever to originate any thing. It can do whatever we know how to order it to perform. It can follow analysis; but it has no power of anticipating any analytical relations or truths. Its province is to assist us in making available what we are already acquainted with. This it is calculated to effect primarily and chiefly of course, through its executive faculties; but it is likely to exert an indirect and reciprocal influence on science itself in another manner. For, in so distributing and combining the truths and the formula of analysis, that they may become most easily and rapidly amenable to the mechanical combinations of the engine, the relations and the nature of many subjects in that science are necessarily thrown into new lights, and more profoundly investigated.” ~Ada Lovelace, Note G, p. 722,Scientific Memoirs, Selections from The Transactions of Foreign Academies and Learned Societies and from Foreign Journals, edited by Richard Taylor, F.S.A.,Vol III London: 1843, Article XXIX. Sketch of the Analytical Engine invented by Charles Babbage Esq. By L. F. Menabrea, of Turin, Officer of the Military Engineers. [From the Bibliothque Universelle de Gnve, No. 82 October 1842].
January 25, 2026 at 5:38 PM
logicalmap.org
I got the toolchain working from Markdown to PDF & HTML using #pandoc . I'm OCD about them looking the same. This doc is easy to add as I go along... and my-o-my, there is a lot of detail to lay down.
The image displays two side-by-side views of a document titled "Logical Map Technical Reference" by Oberon Ohana (dated 2026-01-22). On the left, a PDF viewer shows the document with sections: "Overview" followed by "I cover the design and operation of Logical Map and related systems in detail," "Table of Contents" listing "Floppy PNG" and "QuickJS Extract," and a section titled "Floppy PNG" containing "QuickJS Extract" with code snippets (e.g., import ( open_SEEK_END, loadfile ) from "std";). On the right, the same document is open in a browser window with the browser’s toolbar visible, displaying identical content including the title, author, date, sections, and code. The code snippets include JavaScript-like syntax for extracting data from files (e.g., let img = file.read(4, "u")). Provided by @altbot, generated privately and locally using Qwen3-Vl:30b
January 22, 2026 at 10:31 PM
logicalmap.org
#Servo will mostly render logical maps. The problem is when I adorn the nodes with #d3 (which has to find the node to modify). I'll keep watching/testing, but the big win is DecompressionStream is implemented, so it reads Floppy PNGs. #ServoBrowser
Screenshot of a web page titled "Logical Map" at https:// logicalmap.org/#Top. Top toolbar includes icons (information, download, email, settings, etc.) and "Terms & Privacy" text. Left panel lists terms like "agents", "Govern", "bath", "Energy", etc. Center shows a mind map: green "Govern" node connected to blue nodes (e.g., "0.4 Medical", "0.6 Shelter", "0.7 Water") and red rectangular nodes (R1 Dams, R2 Farmland, R3 Generation, R4 Hospitals, R5 Public, R6 Stores, R7 Supplies). Terminal output below displays error messages: "TypeError: {} does not refer to a JS script", "ERROR server:shel:running_app_state", "ERROR at https:// logicalmap.org:3698:2" and "ERROR at https:// logicalmap.org:3698:32 node.node().getBox is not a function". Provided by @altbot, generated privately and locally using Qwen3-Vl:30b
January 20, 2026 at 3:05 PM
logicalmap.org
The first time a visitor hits logicalmap.org , I want them to get an extra hint to view the key for help, but I don't want it to block reading the site regardless of viewport size, and I don't want them to see it on return. I set a local storage item and use #css .
January 19, 2026 at 8:27 PM
logicalmap.org
My color scheme at the top of Logical Map for my icons (and the map) is based on Paul Tol's Vibrant scheme.
sronpersonalpages.nl/~pault/

#accessibility #ColorBlindness
A material flow titled "Food" is displayed, with a top section featuring icons (information, map, inbox/import, outbox/export, gear/config, save, PDF, key, gavel/legal) and the text "Terms & Privacy." Below, the flowchart includes labeled rectangles and ovals connected by arrows: red-bordered rectangles for "R1 Farm Storage," "R2 Fields," "R3 Stores," "R4 Water"; green-bordered rectangles for "Farm Help" and "Farmers"; blue ovals for "0.3.1 Distribution," "0.3.2 Harvest," "0.3.4 Plant," "0.3.3 Irrigate," "0.3.5 Plow"; and a green rectangle labeled "Wheat Link." Arrows show relationships, such as "Farm Storage" linking to "Distribution," "Farmers" linking to "Wheat Link," and "Fields" linking to "Plant." The left side has text reading "Top → Food."
January 18, 2026 at 7:54 PM
logicalmap.org
The Gear icon will import a config file to set layout options by level, now, on Logical Map:

#KnowledgeGraph #GraphLayout
January 17, 2026 at 10:32 PM
logicalmap.org
Logical map stores locally and saves maps between browser sessions. You can build your own maps directly. Use 📤️ to save maps.
January 14, 2026 at 7:25 PM