Modules
BLAND — Elixir Technical Drawing.
Static base-layer data for geographic figures.
Hand-curated, low-resolution Earth coastline, border, and reference line data.
Hand-curated outlines of the major lunar maria (basaltic plains of the Moon's near side).
Marching-squares contour extraction for 2D scalar grids.
Date-axis support: conversion to a numeric representation, calendar-
snapped tick generation, and strftime-based label formatting.
The plot document.
Geographic projections for plotting longitude/latitude data.
Composes multiple %Bland.Figure{} into one SVG — the multi-panel
layout tool.
Binning and ramp helpers for monochrome heatmaps.
Binning helpers for histograms.
Minimal Livebook integration for live-updating plots.
Scatter-point markers in the monochrome technical-drawing tradition.
Monochrome SVG fill patterns — the hatching vocabulary of a 1970s technical report.
Phoenix LiveView component — embeds a %Bland.Figure{} as inline
SVG in a HEEx template.
Polar coordinate projection and helpers.
Figure-to-SVG renderer.
Coordinate scaling between data space and canvas space.
Series data structures.
Filled area between a curve and a baseline. baseline defaults to
0.0. See Bland.area/4.
Bar series. categories is a list of labels (used for the x axis);
values is the corresponding numeric list. See Bland.bar/4.
Box-and-whisker series. One box per category.
Contour series — iso-level curves on a 2D scalar grid.
Error-bar series — discrete (x, y) points with optional X
and/or Y uncertainty whiskers.
2D grid rendered as hatched cells. See Bland.heatmap/3 and
Bland.Heatmap.
Histogram series. See Bland.histogram/3 and Bland.Histogram.
Horizontal reference line at y.
Horizontal shaded reference region — a rectangle spanning
y ∈ [y1, y2] across the full plot width. Drawn behind every
data series. Useful for acceptance bands, tolerance windows.
Line series. See Bland.line/4.
Closed filled polygon in data space. See Bland.polygon/4.
Quiver series — a 2D vector field. Each (x, y) has an arrow
pointing in the direction of (u, v) with length proportional
to √(u² + v²).
Scatter series. See Bland.scatter/4.
Stem-plot series — a vertical line from baseline to (x, y)
with a marker at the tip. Canonical for discrete-time signals.
Vertical reference line at x.
Vertical shaded reference region — a rectangle spanning
x ∈ [x1, x2] across the full plot height. Drawn behind every
data series so it never obscures the curves.
Smith chart helpers.
Small stats helpers used by the box-plot, Q-Q, and histogram routines. Intentionally narrow — this is not a general stats library.
Line-style vocabulary for monochrome plots.
Low-level SVG element builders.
Theme presets and defaults.
Nice-rounded tick generation.
Engineering-drawing title block.
Mix Tasks
Reads GeoJSON files from priv/basemaps/source/ and emits Elixir
data modules to lib/bland/basemaps/data/.
Produces a fixed set of hero SVGs used by the generated documentation to illustrate each plot type.