Peirce Quincuncial Map Studio

Upload or paste multiple point datasets, style each layer, and export a Peirce quincuncial map.

Theme

▣ Data 0 points▸

⇪

Drop a CSV or Excel file here, or click to choose

Columns: lon, lat, value (value optional). Decimal degrees, WGS84.

One point per line: lon, lat, value

Decimal degrees, WGS84. Value is optional. Example: -0.13, 51.51, 42

Layer name (shown on the map legend)

A set of 100 global points is available as a ready-made layer. Add it any time.

Data layers

◫ Layers ▸

Border

Coastline

Grid

Frame

Data points

Color legend

Lat spacing

Lon spacing

◎ Points ▸

Style layer

Marker type

Circle Square Triangle Diamond Star Plus

Marker size 5.0

Fill opacity 0.90

Edge color

Edge width 0.3

Fill color

By value Single color

Value color scale (selected layer)

Colormap

Reverse colormap

Color scaling

Logarithmic Linear

Auto min and max from data

Min (clip)

Max (clip)

▌ Colorbar ▸

Each value-colored layer gets its own colorbar, numbered and labelled with the layer name.

Tick count 6

Reference threshold line

☉ Projection and frame ▸

Central meridian (lon 0) 0

Zoom (centered) 1.0x

Frame thickness 3.0

Frame color

Figure size (px) 900

◐ Colors and type ▸

Background

Ocean

Background: none (transparent)

Land

Text

Border/Coastline

Border width 0.6

Grid color

Grid opacity 0.50

Grid width 0.6

Font family

Base font size 15

Title (optional)

Caption (optional)

Developed by Ali Reza Shahvaran (https://github.com/arshahvaran/) May 2026 © 2026 Ali Reza Shahvaran. All rights reserved. You may use and share Peirce Quincuncial Map Studio for non-commercial purposes provided you credit the author and link back to this repository. Redistribution or reuse without attribution is not permitted.

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