Cartographic
Contour lines, legend panel, grid coordinates, route markers
Build with it
A starting grammar for a website in the Cartographic register: a pale sheet with a coordinate grid, marks coloured by what they are, every symbol declared in a boxed legend, and importance carried by position, never by size.
Web translation marks our choices for the screen. Not specified by the source marks what the sources leave open. Everything else is a rule from the record below.
The same system is in the brief (Build → Brief) and in the structured data.
Colour
- contour
#A5764C - water
#3A6A8A - route
#B03A2E - ink
#2E2A20 - paper
#F7F5EC
Documented On USGS sheets the line colour names the feature: contours brown, water blue, grids and important roads red, cultural features black. A name takes its feature’s colour.
The rules behind it
- DocumentedColour a line by the class of feature it draws: contours brown, water blue, grids and important roads red, other roads and cultural features black. From a documented finding (colour)
- DocumentedColour a name to match the feature it labels. From a documented finding (colour)
- Graded by our research brief · No source attachedKeep the hues few and carry distinction on lightness and saturation, so figure separates from ground first. From our research brief (colour)
- Web translationTreat each hue as its own layer: one colour, one job, as each was once its own printing plate. Colour on USGS maps was a production separation, one plate per colour. From a documented finding (colour), a documented finding (technique)
- Web translationThe hex values are this room's; the palette itself is a declared freedom. The record fixes what each hue means, not its exact value, and screen charts let the reader switch palettes. From our reading (colour), a documented finding (colour)
Lettering
Harrow Down
Labels set to one standard, each tied to what it names.
- SPIRE
- capitals: accurately positioned
- Spire
- mixed case: approximate
- 12
- upright: fathoms and feet
- 12
- sloping: metres
Documented On NOAA charts, case and slope carry meaning (U.S. Chart No. 1).
The rules behind it
- DocumentedSet type to a standard so sizes and styles stay the same from sheet to sheet, and place every label for legibility. From a documented finding (typography)
- Graded by our research brief · No source attachedTie each label unambiguously to what it names; never let two labels collide. From our research brief (typography)
- DocumentedLet case carry meaning where it is declared: on NOAA charts capitals mark an accurately positioned landmark, mixed case an approximate one. From a documented finding (typography)
- DocumentedLet slope carry units where it is declared: upright numerals for fathoms and feet, sloping for metres. From a documented finding (typography)
- DocumentedLabel index contours with their elevation. From a documented finding (typography)
- Web translationSpectral for names and Karla for labels are this room's faces; any consistent pair will do. The record declares typography a freedom and grounds the behaviour of the type, not a face. From our reading (typography)
The sheet
Reference edges, a grid you can name a cell in, and the boxed legend beside it.
The rules behind it
- From our catalogue entryCompose with a coordinate grid and a legend panel. From our catalogue entry (layout)
- Our readingRank by position and legend order, not by scale. From our reading (hierarchy)
- Web translationGive each section a grid reference the reader can find again on the edges. A labelled reference edge is part of the look; a reference that points nowhere would be an undeclared mark. From our reading, our research brief
- Not specified by the sourceDensity is not specified by the source. Place as much as the grid holds legibly; do not add marks to fill cells.
Frame and marker
Square frames; the one curved form is the route marker, a numbered pin.
The rules behind it
- Web translationKeep frames square and thin: 1px ink round a panel, 2px round the sheet. The legend is boxed and the sheet is bounded; a square frame is the map's own panel. From our reading, our catalogue entry (layout)
- Our readingNo emphasis by scale. From our reading
- Our readingNo decorative contour texture: contours describe elevation or they are not drawn. From our reading
- Web translationThe route marker is a pin: a red disc drawn to a point, numbered. Route markers placed at positions that mean something are part of the recognition signature. From our reading, our catalogue entry
Imagery
Relief by contours on a flat sheet; the heavier index contour carries its elevation.
The rules behind it
- From our catalogue entryUse map illustration. From our catalogue entry (imagery)
- DocumentedDraw relief with contours, not with rendered form. From a documented finding (form)
- Our readingNo photography. From our reading
- Our readingDo not apply the register to content with no real spatial dimension. From our reading
Components
The record documents interface conventions for Cartographic. These four components are contemporary builds on those conventions, not historical artefacts.
The rules behind it
- Web translationDraw actions in route red, the one hue the sheet reserves for the way through. Red on the record is route and road red; an action is the page's route. From a documented finding (colour), our reading (colour)
- Our readingDo not make an action matter by making it larger. From our reading
- Web translationGive each card its grid reference and list its attributes under the name. On an electronic chart a cursor pick queries a feature for further attributes; a card is that answer, placed by reference. From a documented finding (interface), our catalogue entry (layout)
- Our readingRank cards by where they sit and their order in the index, not by size. From our reading (hierarchy)
- Web translationLabel every field above it, like a legend entry beside its symbol. Every mark is declared, and a label must be unambiguously associated with what it names. From our research brief, our research brief (typography)
- Not specified by the sourceThe sources do not specify an error colour. Use words first; mark the field with route red only because red is already the sheet's attention colour.
- Web translationNavigate from the legend: numbered route markers with grid references. The legend panel and the route marker are the register's apparatus; the room already walks its record this way. From our catalogue entry (layout), our catalogue entry
- Our readingOrder by position and legend order, not by scale. From our reading (hierarchy)
Motion
The sheet holds still.
Documented On chart displays a symbol flashes only rarely, to draw attention, never to imitate a flashing light.
The rules behind it
- DocumentedFlash a symbol only rarely and only to draw attention, never to imitate a real flashing object. From a documented finding (motion)
- Web translationOtherwise keep the sheet still; state changes are instant. Motion on the record belongs to electronic charts following a ship; a page has no ship to follow. From a documented finding (motion), a documented finding
- Not specified by the sourceThe sources describe motion only on electronic chart displays, not on printed maps. Do not animate contours or routes for effect.
Legend
- Contour; heavier, labelled: index contour
- Water, and its name
- Grid line, road
- Buildings and cultural features
- Spot height
- Route marker: a section
- Red box: an action
- Red underline: a link
Every mark on this board, declared.
The rules behind it
- Graded by our research brief · No source attachedDeclare every symbol in the legend; a mark the reader cannot decode is a defect. From our research brief
- Our readingNo undeclared symbols. From our reading
- DocumentedOn nautical charts, colour separates human-made features, dry land, drying seabed and permanently submerged seabed, and indicates depth. From a documented finding (colour)
- Web translationDeclare the page's screen marks too: the link underline and the action box join the legend. The contract is that nothing on the surface escapes the legend; a web page adds marks a paper map never had. From our research brief, our reading
Route marker 1Catalogue entry
Route marker 2What carries the look
0 Elements linked
| Typography | Spectral + KarlaPage set in Spectral + Karla. Typographic research on the record. |
|---|---|
| Color | #F2EFE4#2E2A20#6A6350#A5764C#B03A2E#D8D2BE#F7F5EC#C99A2E as built |
| Compositioncarries the look | Nothing linked yet |
| Imagerycarries the look | Nothing linked yet |
| Surfaces | Nothing linked yet |
| Motion | Nothing linked yet |
| Motifs & Symbols | Nothing linked yet |
| Techniques | Nothing linked yet |
No Element is linked to this Aesthetic yet. Each row still opens its gallery.
Route marker 3What it argues
A map is a contract about position.
Every mark is placed where the thing is, and the legend exists so the reader can verify the code rather than trust it — which is why the apparatus is always shown rather than hidden.
It refuses: decorative placement, and refuses any symbol that is not declared in the legend.
Route marker 4How you recognise it
Contour lines describing continuous elevation, a boxed legend declaring every symbol used, a coordinate grid with labelled reference edges, and route markers placed at positions that mean something.
The diagnostic condition is the declared code: every mark on the surface is defined in the legend, so the reader can decode the drawing without external knowledge.
Blueprint uses a comparable apparatus to specify an object for manufacture rather than terrain for traversal. Travel Poster sells a place by simplifying it; this describes a place by encoding it.
Route marker 5Rules
32 · by area, each labelled with what kind of claim it is
- LayoutFrom our catalogue entry
Composition: coordinate grid, legend panel.
- TypographyGraded by our research brief · No source attached
A label must be unambiguously associated with the feature it names, must not collide with another label, and must express the feature's extent. Legibility governs every other typographic choice.
- TypographyDocumented · Source attached
USGS set map type by standards to keep type sizes and styles consistent from map to map, and placed it carefully for legibility.
- TypographyDocumented · Source attached
Lettering styles changed over time within the USGS series, and provisional maps used some hand-drawn lettering.
- TypographyDocumented · Source attached
Case encodes meaning on nautical charts: on NOAA charts all-capital landmark legends mean an accurately positioned landmark and mixed case an approximate one; on NGA charts capitals mean conspicuous.
- TypographyDocumented · Source attached
Slope encodes units: NOAA sets soundings in fathoms and feet as vertical numerals and metres as sloping numerals.
- TypographyDocumented · Source attached
Paper-chart depth labels are centred and oriented along the contour; ECDIS labels are not, and carry a light halo.
- TypographyDocumented · Source attached
Index contours carry their elevation as a label.
- ColorGraded by our research brief · No source attached
Restrict the number of hues and carry distinction on lightness and saturation instead, so that figure separates from ground before any symbol is read.
- ColorOur reading
Restrained cartographic conventions — contour brown, water blue, route red on a pale ground. Reasoned from the medium, not claimed.
- ColorDocumented · Source attached
On USGS topographic maps, line colour codes feature class: contours brown, hydrography blue, land grids and important roads red, other roads, railroads, boundaries and cultural features black.
- ColorDocumented · Source attached
Area colours: vegetation green, water blue, built-up areas grey or red; purple once marked revisions.
- ColorDocumented · Source attached
Names are coloured to match the class of feature they label.
- ColorDocumented · Source attached
Colour is a production separation: each colour was printed from its own plate, six in all on USGS maps.
- ColorDocumented · Source attached
Nautical charts use colour to separate human-made features, dry land, drying seabed and permanently submerged seabed, and to indicate depth.
- ColorDocumented · Source attached
On ECDIS the mariner can change the display palette; the Day table uses a white deep-water ground and the Night table a black one. Conspicuous features are black and non-conspicuous ones brown.
- ImageryFrom our catalogue entry
Imagery: map illustration.
- SurfaceDocumented · Source attached
The same map content is issued on printed paper and on screens, so no material surface is fixed by the specification.
- InterfaceDocumented · Source attached
ECDIS symbology is an international specification, and the same feature displays differently depending on user settings and conditions.
- InterfaceDocumented · Source attached
A cursor pick queries a feature for further attributes.
- InterfaceDocumented · Source attached
Depth areas drive safety alarms when a ship heads into unsafe water.
- MotionDocumented · Source attached
On electronic chart displays, flashing a symbol is to be used only rarely, to draw attention, and never to imitate a real flashing object such as a light.
- MotionDocumented · Source attached
The chart display moves with the ship: during route monitoring it redraws to follow the ship's progress, within 5 seconds.
- MotionDocumented · Source attached
The mariner may choose true motion or relative motion for the display.
- MotionDocumented · Source attached
Area pattern symbols are not required to hold a fixed geographic position when the display redraws.
- TechniqueDocumented · Source attached
USGS printed quadrangles from engraved copper plates carrying contours, symbols and text, from the 1880s to the 1950s.
- TechniqueDocumented · Source attached
USGS scribing engraved each colour's lines and symbols onto separate sheets over a light table, with type placed on overlaid clear plastic sheets.
- TechniqueDocumented · Source attached
Maps were printed by multi-run colour lithography, one plate per colour; digital separations were replacing manual scribing.
- FormDocumented · Source attached
Topographic maps encode 3D terrain on a 2D surface, through contours and relief conventions rather than physical form.
- HierarchyOur reading
Rank by position and legend order, not by scale. A feature matters because of where it sits and where it appears in the declared code. Consistent with Archival's refusal of editorial ranking, and equally unusual for a webpage.
- Form / motif / surface / techniqueFrom our catalogue entry
Form / motif / surface / technique: contour, grid, route marker.
Not yet mapped to one of the twelve areas. - LegendGraded by our research brief · No source attached
Every symbol on the surface is declared in the legend. A mark the reader cannot decode from the drawing itself is a defect, not a flourish.
Not yet mapped to one of the twelve areas.
Ruled out, or left open by the sources
- FormDoes not apply
Research found the area does not apply.
Route marker 6What stands behind it
Partly sourced. 8 sources attached. 3 claims graded by our research brief, no source attached.
Build guidance: recorded in 6 of 8 research dimensions. It says what usable material is recorded, never how well it is evidenced.
No source attached: Argument, Recognition test.
Not researched yet: Summary, Typeface guidance, Overall positions by area, Ornament and contrast scales, Moving it to screen, Source notes.
Scope: The visual register of agency-specified maps and charts: declared symbology, contour and other relief conventions, brown-contour/blue-water colour coding, as Aesthetary's language drawn from USGS and IHO practice; grids and route markers are ours.
Neither is a free hand: an area research has not reached is not permission to decide on the language’s behalf.
| Research dimension | Evidence | Carries guidance |
|---|---|---|
| Composition | Specified · From our catalogue entry | yes |
| Typography | Specified | yes |
| Hierarchy | Specified · Our reading | yes |
| Colour | Specified | yes |
| Density | Not specified by the source | no |
| Imagery | Specified · From our catalogue entry | yes |
| Form / motif / surface / technique | Does not apply: form · Specified: motif, technique · Left open: surface | yes |
| Motion | Specified | yes |
Route marker 7Often confused with
Blueprint · Aesthetic
Terrain versus object; traversal versus manufacture.
Travel Poster · Aesthetic
Encoding versus simplifying. Both depict place; only one lets you navigate.
Nautical
Signal-flag grammar; needs a genuine connection to the sea
Route marker 8Use it
For machines: data/v1/cartographic.json · prompt/cartographic.md
Suggest a correction to Cartographic · Request deeper research
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