Module 1.3 Questions

What method do you use to fetch a GeoJSON file in JavaScript?

• getData()

• loadJSON()

• fetch()

• requestGeo()

After fetching a file, what do you chain to parse it as JSON?

• .parseJSON()

• .toJSON()

• .then(res => res.json())

• .jsonParse(res)

What Leaflet method turns GeoJSON data into a map layer?

• L.layerGroup()

• L.geoJSON()

• L.jsonLayer()

• L.mapData()

Which option logs each feature's properties?

• L.bindPopup()

• console.log(layer)

• onEachFeature

• addEventListener

How can you count the number of features in a layer?

• layer.countFeatures()

• map.featureCount()

• layer.getLayers().length

• features.length

What method returns a layer's spatial bounds?

• layer.extent()

• layer.getZoom()

• layer.getBounds()

• layer.center()

How do you zoom the map to a layer's bounds?

• map.zoomTo()

• map.fitBounds()

• map.setZoom()

• map.setExtent()

Which render mode is most performant for 10000 points?

• Vector

• SVG

• Canvas

• HTML

What method measures rendering time?

• performance.log()

• console.time()

• log.time()

• debugTime()