topojson

Last year I made a couple experiments on web maps using the Mapnik library (server-side, bitmap/tiling). Now I'm trying to replicate the same experiments using the vector, client-side approach with d3.js. I have a map (~680 shapes) where zoom is slow and pan is sluggish ( this example by Mike Bostock works well). I suspect the problem is in the zoommove callback, the selectAll("path").attr("d", path) takes too long. function zoommove() { projection.translate(d3.event.translate).scale(d3.event.scale); mapa.selectAll("path").attr("d", path); console.log('zoommove fired...'); } Questions : Am I

I am creating a map of a particular state, I have been experimenting with d3.js and topojson and have created a great map, but now I want to add a marker on the map. But now I have problems because as I add the marker have a GeoJSON file to add markers to the map generated and also the power I'd like to open a tooltip whenever a marker is pressed. My map is very similar to this: http://bl.ocks.org/mbostock/4699541 and all I want is to add markers to states through a GeoJSON file that has the geographical coordinates of the markers. So the map is currently Map expected... You can add somthing

related question I'm trying to add external properties to a topojson file, us-counties.json (made with us-atlas using make topo/us-counties.json ). I'm working off this example . But my resulting topojson file us-counties-with-population.json has no properties at all . My call looks like: topojson --external-properties data.csv \ --id-property id_county \ --properties population=+percent_population \ -o us-counties-with-population.json \ -- us-counties.json and my data looks like ( head -n5 data.csv ): id_county,county_name,percent_population 01003,"Baldwin County, Alabama",9.71576144493279

I am trying to create an interactive map that visualizes certain data. I used leaflet map and a topojson layer on it. Next, I tried to add static labels on each of the topojson polygons using leaflet label plugin i.e. the labels should always be there and should not react to mouseover event. I tried implementing bindLabel() method with noHide:true , but it didn't seem to work. Therefore, I implemented the solution provided to this question Simple label on a leaflet (geojson) polygon . I succeeded in adding static labels. Then, I have a function that removes a topojson polygon on click event. I