Between January 2004 and June 2011 The Map Room was published using Movable Type. The following categories were used. After a while they got a bit unwieldy (tags would have helped), so I’m starting fresh with the 2016 relaunch. The old categories are included here for the sake of completeness, and in case you find it useful.
- Antique Maps (337 entries)
- Collecting (57 entries)
- Hoaxes & Controversies (20 entries)
- Map Thefts (112 entries)
- Art (153 entries)
- Astronomy (114 entries)
- Big Maps (20 entries)
- Blogs (159 entries)
- Books (251 entries)
- Book Reviews (24 entries)
- Cartography (79 entries)
- History of Cartography (24 entries)
- Map Projections (38 entries)
- Censorship, Security & Privacy (77 entries)
- Cities (66 entries)
- Baghdad (2 entries)
- Beijing (3 entries)
- Berlin (2 entries)
- Boston (7 entries)
- Chicago (17 entries)
- Hong Kong (3 entries)
- Houston (4 entries)
- Las Vegas (3 entries)
- London (62 entries)
- Los Angeles (9 entries)
- Manchester (3 entries)
- Montreal (2 entries)
- New Orleans (13 entries)
- New York (66 entries)
- Ottawa (4 entries)
- Paris (11 entries)
- Pittsburgh (4 entries)
- Portland (4 entries)
- Prague (2 entries)
- Rome (4 entries)
- San Francisco (20 entries)
- Seattle (4 entries)
- Shanghai (2 entries)
- Tokyo (6 entries)
- Toronto (12 entries)
- Vancouver (3 entries)
- Citizen Cartography (26 entries)
- Communications (10 entries)
- Conferences (64 entries)
- Copyright (24 entries)
- Current Events (110 entries)
- Deepwater Horizon Oil Spill (8 entries)
- Eyjafjallajökull (4 entries)
- Haitian Earthquake (13 entries)
- Hurricanes 2005 (25 entries)
- Indian Ocean Tsunami (3 entries)
- Iraq War (6 entries)
- Israel-Lebanon Conflict (7 entries)
- London Bombings (2 entries)
- New Zealand Earthquake (7 entries)
- Olympics (12 entries)
- Tornadoes in the Southeastern U.S. (4 entries)
- Dealers & Stores (15 entries)
- Demography (29 entries)
- Design (5 entries)
- Typographic Maps (9 entries)
- Disputed Boundaries & Names (15 entries)
- Earth Sciences (38 entries)
- Earthquakes (36 entries)
- Education (35 entries)
- Electoral Maps (91 entries)
- Energy & Resources (20 entries)
- Environment (65 entries)
- Exhibitions (143 entries)
- Baltimore Festival of Maps (8 entries)
- Chicago Festival of Maps (13 entries)
- London: A Life in Maps (5 entries)
- Magnificent Maps (10 entries)
- Fiction About Maps (11 entries)
- Fun (55 entries)
- GIS (123 entries)
- GPS (179 entries)
- Geocaching (15 entries)
- Tracerouting (20 entries)
- Games & Quizzes (9 entries)
- Geography (2 entries)
- Geolocation Services (33 entries)
- Georeferencing (12 entries)
- Geotagging (106 entries)
- Globes (32 entries)
- Groups & Societies (30 entries)
- Hand-Drawn Maps (17 entries)
- Health (20 entries)
- Historical Maps (50 entries)
- Imaginary Places (48 entries)
- Industry News (40 entries)
- Languages & Linguistics (9 entries)
- Libraries (55 entries)
- Map Literacy (17 entries)
- Mapping Errors (70 entries)
- Maps Online (17 entries)
- Military (3 entries)
- Miscellany (228 entries)
- Mobile Devices (120 entries)
- Obituaries (15 entries)
- Online Maps (399 entries)
- Hacks & Mashups (193 entries)
- Orienteering (one entry)
- Other Technology (9 entries)
- Personal (5 entries)
- Podcasts & Audio (28 entries)
- Publishers (18 entries)
- Questions (49 entries)
- Satellite & Aerial (294 entries)
- Scholarly Journals (16 entries)
- Site News (87 entries)
- Software (80 entries)
- Facebook (7 entries)
- Google Earth (151 entries)
- Macintosh (75 entries)
- World Wind (9 entries)
- Surveying (49 entries)
- Talks & Presentations (7 entries)
- Tech Reviews (7 entries)
- Topo Maps & Trails (78 entries)
- Toponyms (24 entries)
- Transportation (5 entries)
- Aviation (18 entries)
- Driving Directions (103 entries)
- Mass Transit (109 entries)
- Nautical (30 entries)
- Railroads (31 entries)
- Roads (40 entries)
- Traffic Conditions (17 entries)
- Triangulations (Links) (12 entries)
- Video (71 entries)
- Weather & Climate (78 entries)
(In 2003 I was using Blogger, which didn’t support categories at all at the time.)