ec-atlas v0.0.7

Ecuador Atlas TopoJSON

This repository provides a convenient redistribution of the Ecuador cartographic boundary shapefiles, 2015 edition as vector data.

To align the names of subnational jurisdictions in Ecuador, four levels have been set:

• level1: country
• level2: provinces
• level3: cantons
• level4: parishes

Usage

You can use the geojson and topojson files in your map on a webpage.

To visualize with d3:

d3
    .geoIdentity()
    .reflectY(true)
    .fitSize([width, height], features)

Or using Plot in observablehq, see an example here

Generating the files

Clone or download the repo and start a terminal. Then run npm run prepublishOnly to transform the downloaded zip files into topojson files.

If you need to make further adjustments (projection, simplification, quantization) you can change the prepublish config file and run npm run prepublishOnly again.

Note: Use the identity projection to visualize the map.

Reference

# simplification

Removes points to reduce the file size. Set to 3% by default.

# quantization

Removes information by reducing the precision of each coordinate. Set to 1e5 by default.

File Reference

# ecuador-transverse_mercator-50k.json · Download

A TopoJSON file containing 4 levels of geometry. The geometry is quantized and simplified and projected.

# ec.objects.level4

Each parish has two properties:

• parish.id - the six-digit DPA_PARROQ code, such as "010152"
• parish.properties.name - the district name, such as "CUMBE"

The first two digits of the parish DPA_PARROQ code is the province code.

# ec.objects.level3

Each canton has two properties:

• canton.id - the four-digit canton code, such as "0102"
• canton.properties.name - the province name, such as "GIRON"

# ec.objects.provinces

The provinces has two properties:

• province.id - the string "01"
• province.properties.name - the string "AZUAY"

Inspiration

The original idea and implementation comes from Mike Bostock’s us-atlas and world-atlas.