I want to print a map in leaflet,but i am stuck in some points:
First:The points (markers) didn't appear,
Second:i want to be able to define the scale in the printing time,
Third:i want to print the legend beside the map not on the map as in the picture below.
Can anyone help me?
L.easyPrint({
title: 'Print the map',
position: 'topleft',
elementsToHide: 'p, h2,h3,h5,a,label,nav,select,button,i,legend'
}).addTo(mymap);
Related
I've got an ECharts chart that has multiple line series and a scatter series that represents events. For the line series, we left the symbol at the default, but for the event scatter series we set the symbol to 'diamond'. These symbols show up on the chart & in the series legend as expected. However, the tooltip always shows a 10 pixel dot for the marker. The color however is picked up from the series (and even from the visualMap config!). My initial assumption had been that the symbol would also be picked up from the series. In our case we wanted to use a function for tooltip.formatter and even in that function we couldn't figure out how to access and swap in the series symbol for the marker. We ended up working around it by just custom styling our own html to plug in for the marker that matched the diamond symbol pretty well.
So the open questions are:
Is there a way to have the tooltip marker pick up the symbol from the series?
If not, is this a bug? I'm happy to put in an issue on the project but I don't want to do that until I understand a bit more.
Here's some code to illustrate what we had to do to get the diamond in there in case it helps the discussion or if others want to leverage this workaround:
formatTooltip(args){
let time = DateTime.fromISO(args[0].data[0], { zone: this.user.timeZone })
let tooltip = `<div><b>${time.toFormat(TOOLTIP_FORMAT)}</b></div>`
args.forEach(({ marker, seriesName, value }) => {
if (seriesName === 'Events'){
let myMarker = `<span style="display:inline-block;margin-right:4px;width:10px;height:10px;background:${value[4]};transform:rotate(45deg);"></span>`
tooltip += `<div>${myMarker} ${value[3] ? value[3]: ''}</div>`
} else {
value = value || [0, 0]
tooltip += `<div>${marker} ${seriesName}: ${value[1]}</div>`
}
})
return tooltip
},
So I am using Pixels in my Leaflet using crs: L.CRS.Simple and unproject in all the places I reference coordinates, it is working great.
However I am now trying to add a search bar and there is one line that I cannot figure out how to make it use pixels instead of LatLng (it's pulling pixel coords from a file)
var title = data.newsroom, //value searched
loc = [data.latitude, data.longitude] //position found
marker = new L.Marker(new L.latLng(loc), {title: title, icon:icon} );//se property searched
marker.bindPopup("<strong style='color: #84b819'>" + title + "</strong><br>" + data.company + " | " + data.city + "<br>Head: " + data.head);
markersLayer.addLayer(marker);
}
It's the marker = new L.Marker(new L.latLng(loc) line..I can't figure out how to unproject in that line to make it use pixels. Tried 100 different things but...yeah, I am not a coder so It has me dumbfounded.
Thanks in advance!
Try map.latLngToContainerPoint(latlng)
This converts the latlng to your container point.
https://leafletjs.com/reference-1.6.0.html#map-latlngtocontainerpoint
There is an example of the heatmap https://www.mapbox.com/mapbox-gl-js/example/heatmap/ by the number of markers/points on the area. But is there a way to display a heatmap by average pins/markers values? For example if I have 5 pins and their average prop value speed=3 then it will be shown as green cluster/heatmap and if their av. prop val is 6 then it will be red cluster/heatmap.
I found that "clusterAggregates" property can help, but can't find any example of using it.
Thanks
I'll leave my way to do so. Old question, which is sometimes risen, but there are no nice sollution, so... Turf's hexgrid (http://turfjs.org/docs/#hexGrid) can help:
const hexagons = hexGrid(bbox, size);
const collection = // collection of your points;
const hexagonsWithin = collect(hexagons, collection, "propertyToAgretateFrom", "propertyToAggregateIn");
const notEmptyHexagonValues = hexagonsWithin.features.filter(({ properties }) => properties.propertyToAggregateIn.length !== 0);
const notEmptyHexagons = {
"type": "FeatureCollection",
"features": notEmptyHexagonValues,
};
// at this point you're having not empty hexagons as a geojson, which you can add to the map
collect is another method from turf, whatcollection should be you can look up in the docs, because it's changing a lot.
The general idea behind is to "divide" visible part of map (bbox) into hexagons by hexGrid method and and aggregate some properties that you need from every marker inside of every hexagon you'll have into the array, so you can get an average value, for example. And assign a color based on it.
Let's say we have feature.properties.propertyToAgretateFrom as 4 and 5 in two markers. After the aggregation, if these markers were inside one polygon, you'll have it feature.properties.propertyToAggregateIn: [4, 5] - this feature is polygon. From this on you can do pretty much everything you want.
I am not sure what the exact technical term for this question would be so please pardon the noobish question.
I have a leaflet map like this:
var map = L.map("dvMapContainer",
{
}).setView([39.782388193, -86.14135265], 14);
I am adding a marker to this map like this:
var vehicleMarker = new L.Marker([39.782388193, -86.14135265], { id: 'vehicle', icon: cssIcon });
map.addLayer(vehicleMarker);
Every few seconds, I update the position of the vehicleMarker and center the map
vehicleMarker.setLatLng(newLatLng);
map.setView(newLatLng, 18);
This works fine however the effect is not very visually pleasing as the map is constantly moving. I would like to move only the marker until it gets close to the edge of the map and then recenter the map. Is that possible ? Any hints/solutions will be much appreciated.
Each time you check (every few seconds), you can compare your marker location with the map bounds:
var bounds = map.getBounds();
if(vehicleMarker.getLatLng().lng > bounds.getEast()-.001 || vehicleMarker.getLatLng().lng < bounds.getWest()+.001 || vehicleMarker.getLatLng().lat > bounds.getNorth()-.001 || vehicleMarker.getLatLng().lat < bounds.getSouth()+.001)
//change bounds
If your next marker location is close to your current bounds, then change your map's current bounds.
You can change the .001 depending on how far zoomed out you are.
More info on bounds here: http://leafletjs.com/reference.html#latlngbounds
I am using google charts for plotting a graph
How can I show annotation of the point at right-hand-side of the point but it showing on the top of point
http://i.stack.imgur.com/UHhQH.png
I want it like as follow
http://i.stack.imgur.com/lUBcq.png
Please any one help me out
You can actually change the position of the annotations, by using css tranform.
You should first get a handle to the anntation text, if you want to change all the text, then you can use the text tag name in css
text {
transform: translate(10px, 30px);
}
I was able to adjust annotations to the right by doing 2 things:
1) Entered some white spaces (\u00A0 is white space) and a long dash (—) on the left side of the desired annotation.
2) Added stem length of -3.
var dataTable = new google.visualization.DataTable();
dataTable.addColumn('string', 'Model');
dataTable.addColumn('number', 'T');
dataTable.addColumn({type:'string', role:'annotation'});
dataTable.addRows([
['ABC',30,'\u00A0\u00A0\u00A0\u00A0 — X'],
['DEF',20,'\u00A0\u00A0\u00A0\u00A0 — Y'],
['GHI',10,'\u00A0\u00A0\u00A0\u00A0 — Z'],
]);
var options = {
1: {annotations: {stem: {length: -3}}
};