Klokantech Basic Preview

Dynamic tile masking and more

This example demonstrates interactive masking of OpenStreetMap tiles over a stamen.com toner base map, controlled by user-drawn polygons. Using Leaflet’s draw control, users create shapes that act as SVG masks, revealing or hiding the underlying OSM tile layer. The visualization also applies SVG filters, such as grayscale, hue rotation, and sepia, to the map tiles, and offers a selection of hatch patterns for the mask fills. The code integrates D3.js (v3) for projecting GeoJSON geometries into Leaflet’s coordinate system and manipulates the SVG `defs` and mask elements directly.

KKoGor

04: Custom Map Controls

This example demonstrates a map with two toggleable layers—hexbins and crash points—overlaid on a Mapbox GL base map. The hexbins are generated from a GeoJSON dataset of NYC crashes using Turf.js to create a hex grid and count incidents per cell, colored with a Jenks natural breaks classification. Custom UI buttons let users toggle each layer on and off, with active states highlighted. The code also shows how to filter invalid geometries and style layers dynamically.

55un

TopoJSON via MapBox & Leaflet

This example shows a map of the United States with county boundaries rendered as vector shapes, overlaid on a zoomable and pannable MapBox tile layer. It combines D3.js and TopoJSON to load and parse county geometries from a remote GeoJSON-like file, then uses MapBox’s Leaflet-based `L.geoJson` to display them with a simple gray outline style. The map initializes at a low zoom level, and the counties are added as a single layer after asynchronous JSON retrieval, demonstrating integration between D3’s data handling and Leaflet’s mapping API.

CCaged

Untitled

This example displays a Leaflet map centered on a coastal area, with several vector layers added programmatically. It shows a GeoJSON polygon and point rendered via `L.geoJson`, alongside a marker, a red circle, and a polygon created with `L.marker`, `L.circle`, and `L.polygon`. The map uses a MapTiler Voyager tile layer with CARTO and OpenStreetMap attribution. Popups are bound to each shape, with the marker’s popup opened by default, demonstrating basic interactive map layers in a React-agnostic HTML setup.

Ccharliemok

Lots of points in Mapbox Basemap - Test

This example demonstrates a Mapbox GL map with a tilted and rotated view centered on the New York City area. It shows how the map’s basemap style can be dynamically switched via a custom control panel overlaid on the map. The page uses the Mapbox GL JS API to initialize the map with a specific style, pitch, bearing, and zoom level, while the `switchLayer` function updates the map’s style based on user input. A transparent title box with radio buttons allows selection among different style layers, and the Navigation control adds zoom and rotation controls.

WWill Carter

GeoJSON Experiments

This example displays geographic data on an interactive Mapbox map, using the Mapbox.js library and a full-screen map div. It fetches GeoJSON data from a CouchDB view via a jQuery `$.getJSON` call, then loads the returned feature collection into the map’s `featureLayer` with `setGeoJSON`. The map is initialized with `L.mapbox.map` and centered on coordinates (10.1, 125.6) at zoom level 5, showing how dynamic GeoJSON can be rendered on a tiled basemap.

CCliffordAnderson

Gist 6b515fcc2b7c6479d9c31059140eb611

This example displays a full-screen interactive map of the contiguous United States, centered on the country’s geographic midpoint using Mapbox GL JS. The map uses a custom Mapbox style and includes a navigation control for zoom and rotation. The viewport is constrained to the bounding box spanning from the Southwest to the Northeast corners of the lower 48 states. The code sets an initial zoom level and center coordinates derived from that bounding box, but does not load or visualize any external data layers.

WWill Carter

Gist cd3b399ded90abed9e03930563398518

This example displays a Mapbox GL JS map centered on Houston, Texas, at zoom level 10, with a set of airfield-style symbol markers plotted over a custom vector tile source. The visualization uses `map.addSource` to load a hosted vector tileset containing school location data and `map.addLayer` to render those points as icons via the `symbol` layer type. A collapsible overlay panel and a menu for switching map views are included, though the menu’s active state and overlay content are not populated in the provided code. The map style is a custom Mapbox style URL.

JJn1532