leaflet-ajax | plugin for leaflet for ajax | Plugin library
kandi X-RAY | leaflet-ajax Summary
kandi X-RAY | leaflet-ajax Summary
Allows you to call JSON via an Ajax call with a jsonp fallback. for jsonp add the option "dataType" and set it to "jsonp". Note that data starts to download when the layer is created NOT when it’s added to the map in order to get a head start. You may pass either a url string or an array of url strings if you want to download multiple things (handy if your downloading data from an ESRI based thing which will have separate line, point, and poly features). As you see you can also use lower case methods without creating new objects. For weirder jsonp you can set "callbackParam" for if you need to change the name of the callback parameter to something besides "callback", e.g. [Mapquest Nominative Open] uses "json_callback" instead of "callback". If you want to be able to load stuff from the file system (with appropriate custom flags set) set local to true. If you want to set headers to the XMLHttpRequest set the headers option equal to an object. Gives off three events data:loading, data:progress and data:loaded.
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QUESTION
In my django app I am using Geodjango, django-leaflet and leaflet-ajax. I have a route model with a LineStringField. I want to render that route in a template using a leaflet map. I have tried the following code with other models (those that have a Point field instead). But for any reason this code is not working with the RouteModel. The leaflet map shows nothing. How can I add that route to the "gis" leaflet map
Here is the model definition
...ANSWER
Answered 2021-Jun-08 at 16:35I just found the Issue: I had a duplicate of the route_get_location function in another file. So the this post is a working example of how to represent a Geodjango model using django-leaflet and leaflet-ajax
QUESTION
(Not for HW) Hi, I'm running the following code and cant figure out why my buttons won't create. Instead of where the buttons should be, there are snippets of code. I added a javascript function to create buttons for each feature in GeoJSON but it looks as if the button wont work properly. Any help would be great. My question refer to specifically the lines of code starting from var = geoJSONLayer new. The geoJSON layer exists within the same folder as the index HTML file. The markers show up but the buttons cannot be created. The following turf function will not work either.
...ANSWER
Answered 2020-Feb-21 at 19:38Src link to leaflet.ajax.js is broken. You have to link it to a working link.
Replace this tag
QUESTION
I'm building a pyqt5 desktop interface where I'm using QWebEngineView to show a html file where I show a Leaflet map. This is working fine. The next step is to export all features the user added to the map. When I click on "Export Features" on the map nothing happen, but when I open the same html file on my Chromium web browser, the "Export feature" opens the download dialog fine.
PyQt5 script:
...ANSWER
Answered 2018-May-04 at 03:05That popup window is generated by the browser, in the case of QWebEngine we must create it. To start, the signal indicating the download must be detected, and this signal is downloadRequested from the QWebEngineProfile. That signal sends us a QWebEngineDownloadItem object that handles the download, in it we create a dialog window with the help of QFileDialog. For this case we will create a custom QWebEnginePage as shown below:
index.html
QUESTION
I am working on a leaflet map which will allow a user to click on an area on the map and download respective river data based on the area of the click, however am struggling on the download functionality. I have included my current code and an image of the output of the code. How can I have the script download a file depending on which tile (see below image) the user clicks on? Ideally i'd like to use the download tag or have an on click JavaScript event so that each click of a tile downloads it's respective data.
...ANSWER
Answered 2019-Apr-19 at 08:17Why dont you try the on click function for the map. You can start from here and then find out what you clicked with the response of the click. For example you can check the lat lng and compare it to an array to see if you clicked on a some part of the map that had some downloadable item. From there its easy to download.
QUESTION
I'm using leaflet-ajax to load geoJSON on demand. I want to find the maximum theProperty value so I can use that to scale the feature's fill colors before I add them to the map.
Here's my general approach:
...ANSWER
Answered 2017-Mar-03 at 07:00As for your issue about inspecting your data and retrieving the maximum value, you are indeed facing the classic asynchronous concept of JavaScript.
See How do I return the response from an asynchronous call?
Asynchronism is a problem if not dealt with properly, but an advantage if correctly handled.
To put the concept shortly, you do not manage asynchronism in a "standard" sequential way, but you should rather consider parts of code (callbacks) that are executed at a later time based on events.
Whenever you provide a function as an argument, it is certainly a callback that will be executed at a later time, but very probably much later than the next instructions.
So in your case, your 2nd and 3rd console.log are within a callback, and will be executed once your data is loaded, which will happen much later than your 4th console.log.
As for your next step (styling and adding to map), you actually do not need to perform an extra AJAX call, since you already have all data available in theGeoJson variable. You simply need to refactor / restyle it properly.
It is a good approach to break your problem in small steps indeed.
Good luck!
PS: that being said, ES7 provides async and await functionalities that will emulate a sequential execution for asynchronous functions. But to be able to use those, you need latest browser versions or transpilation, which is probably more work to learn and configure as of today for a beginner than understanding how to work with async JS.
QUESTION
I have two leaflet webmaps on my webpage, one containing polygons with voting data and the other that will tell you how far your mouse is from a marker.
However, it seems that the OnEachFeature and OnMapClick functions of GeoGame.js affect the behaviour of the mouseOut, in that the polygons are no longer highlighted properly.
HTML
...ANSWER
Answered 2018-Jan-12 at 22:37It turns out that for some reason the geoJson variable has global scope between the two .js files, so my solution was to rename geoJSON in GeoGame.js to GMgeoJson.
QUESTION
I am referencing two JS files in my map.HTML header. Chrome console gives
...ANSWER
Answered 2017-Jul-26 at 13:56In the future, try to do more research before posting here, otherwise a lot of people are going to downvote your questions, and even insult you.
A simple Google search for the differences between html and javascript may be a good start. The first step would be to remove those doctype lines. They mean nothing in Javascript. Just like the word granola has no meaning in Japanese. Different languages.
However, looking at your code, I don't see any DOCTYPE text in your javascript. In order to really debug this, you're going to want to open your webpage (html) in a browser (I recommend Chrome) and press F12 to open the developer tools. Go to the console and trace the error back through all of the files to find the origin.
In order to check and make sure that you're trying to pull javascript files and not html, take all the src urls you're using and paste them in a browser. If you land on a webpage, that url will serve up html, not javascript like you want. If you get a wall of text, you're probably referencing it correctly.
Correct: https://api.mapbox.com/mapbox.js/v3.0.1/mapbox.js
Incorrect: https://github.com/socib/Leaflet.TimeDimension/blob/master/dist/leaflet.timedimension.min.js
Hopefully this helps before this question gets deleted or put on hold. Also notice that people are going to downvote me for actually answering and trying to help.
QUESTION
I am trying to change the style of a layer of lines strings in leaflet 1.0.3. My layer is a geoJSON layer generated using an ajax call and the leaflet-ajax lib. I can see my layer on the map, but it inherits the default styling, not the styling I am trying to add.
...ANSWER
Answered 2017-Mar-09 at 16:41You should try to define a function which will style each line as it is loaded up into Leaflet.
From this link: https://github.com/Dominique92/Leaflet.GeoJSON.Ajax
QUESTION
I'm working on my first GeoDjango project. And I'm using django-leaflet + GeoJSON together with leaflet-ajax to display markers on the map.
I would like to have an image attached to each "properties" to be displayed in the popup. But does django.contrib.gis.db play nice with ImageField. Because if I just go ahead and add a model.ImageField field to the model, I get an Type Error when saving from the Admin. That it has to be a string.
I just wanna ask if it is possible to do this? I'm hoping that is and that I've just made mistake, that I need to find. Or should take another approach?
P.S. I'm using Postgres
...ANSWER
Answered 2017-Feb-16 at 20:31There shouldn't be a problem using ImageField with django.contrib.gis.db.
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