GeoMap | JavaScript geoJSON map | Map library
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kandi X-RAY | GeoMap Summary
JavaScript geoJSON map
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QUESTION
I am a django beginner and trying to programm a simple geo application. My setup: django/geodjango + leaflet. Everything works fine and geo objects (GeoObject) are displayed. But now I want to add aditional properties ("status") from another model and display them also via leaflet - but I´m stuck.
my models.py:
...ANSWER
Answered 2022-Jan-13 at 21:42Why are you trying to do that? You can simply create object in views and add data to your GeoObject model.just add data column to your database and after that in views you can add specific data to your model.
QUESTION
So I have implemented Echarts with a Vue application, on one of the charts, I am trying to get the item clicked and pass it back to the parent component that way I can do specific calculations to it.
The 'on click' method works and I can console.log('params') easily, however, trying to reach any other functions outside of it is not possible for some reason...
here is my code...
...ANSWER
Answered 2021-Oct-28 at 17:21You're not in the Vue component context when listening to the chart event, so you have to change your callback function to an arrow one to access the component's this :
QUESTION
I would like to plot something that resembles a kdeplot using geoviews without actually plotting the contour lines. The geoplot library supports something like this:
How can I make such a plot in geoviews?
Here is a very basic example of the kind of kdeplot I am managing to generate via geoviews, which by default plots the black lines that separates different intensities:
...ANSWER
Answered 2021-Sep-12 at 16:55The argument you have to use is line_color and in your case you want to set it to None.
Applying the change to this line of code
QUESTION
I have a VueJS component which is a svg map image of the united states. I previously used jquery to create hover effects to display the information bubble. I am trying to convert this to a pure Javascript solution. It seems a click event is the easiest to implement given vuejs mousemove seems to be less reliable. I have added the click event in method and I am trying to capture the SVG path location and steal the top and left position to enable the info box there. I have tried this.offsettop and this.offsetleft but they return undefined.
Jquery code I am trying to convert:
...ANSWER
Answered 2021-Apr-30 at 17:11The solution was found in the comments on the question.
In summary, the issue was understanding how to position the #info-box element. Using the getBoundingClientRect() function, we can get the position of any element relative to the entire document. To get the position of the clicked path element, simply subtract the top and left of the #us-map from the top and left of the path. This will give the position for the top left corner of the path, relative to the containing element. We can then use that to position the #info-box.
QUESTION
simply this works:
...ANSWER
Answered 2020-Dec-25 at 22:38{
var geoMap = new LiveCharts.WinForms.GeoMap();
var heatMap = new Dictionary();
var randomnumber = 0;
foreach(var item in _drzave)
{
randomnumber += 551;
heatMap.TryAdd(item.sImeDrzave, randomnumber);
}
geoMap.HeatMap = heatMap;
geoMap.Source = $"{Application.StartupPath}\\World.xml";
metroTabPage2.Controls.Add(geoMap);
geoMap.Dock = DockStyle.Fill;
}
QUESTION
I have created a Google Geochart widget some time ago with an older Google JS library version. Nowadays Google advised to upgrade to update to the loader api instead of the jsapi. No matter how I load the libraries, for me the visualization library doesn't load properly, hence I get an undefined when trying to instantiate a GeoChart object. Did anybody else encounter this issue as well?
(The JS code is in the form of Dojo widget functions)
...ANSWER
Answered 2020-Nov-10 at 12:48setOnLoadCallback expects a reference to a function --> this.drawChart
not the result of a function --> this.drawChart(callback)
try as follows...
QUESTION
I'm trying to solve an interview problem I was given a few years ago in preparation for upcoming interviews. The problem is outlined in a pdf here. I wrote a simple solution using DFS that works fine for the example outlined in the document, but I haven't been able to get the program to meet the criteria of
Your code should produce correct answers in under a second for a 10,000 x 10,000 Geo GeoBlock containing 10,000 occupied Geos.
To test this I generated a CSV file with 10000 random entries and when I run the code against it, it averages just over 2 seconds to find the largest geo block in it. I'm not sure what improvements could be made to my approach to cut the runtime by over half, other than running it on a faster laptop. From my investigations it appears the search itself seems to only take about 8ms, so perhaps the way I load the data into memory is the inefficient part?
I'd greatly appreciate an advice on how this could be improved. See code below:
GeoBlockAnalyzer
...ANSWER
Answered 2020-Sep-29 at 13:36Without testing, it seems to me that the main block here is the literal creation of the map, which could be up to 100,000,000 cells. There would be no need for that if instead we labeled each CSV entry and had a function getNeighbours(id, width, height) that returned the list of possible neighbour IDs (think modular arithmetic). As we iterate over each CSV entry in turn, if (1) neighbour IDs were already seen that all had the same label, we'd label the new ID with that label; if (2) no neighbours were seen, we'd use a new label for the new ID; and if (3) two or more different labels existed between seen neighbour IDs, we'd combine them to one label (say the minimal label), by having a hash that mapped a label to its "final" label. Also store the sum and size for each label. Your current solution is O(n), where n is width x height. The idea here would be O(n), where n is the number of occupied Geos.
Here's something really crude in Python that I wouldn't expect to have all scenarios handled but could hopefully give you an idea (sorry, I don't know Java):
QUESTION
I'm trying to use syncfusion in angular in order to use Geomaps. (https://ej2.syncfusion.com/angular/documentation/maps/getting-started/) When I try to execute my component I obtain this error:
**ERROR in The target entry-point "@syncfusion/ej2-angular-maps" has missing dependencies:
- @angular/core
- @angular/common**
I tried to execute npm install, to add the exact path of angular core in my projects, but it doesn't work.
This is my package.json file
...` {
ANSWER
Answered 2020-Sep-29 at 18:48Thank you for contacting Syncfusion support.
We are not able to reproduce the reported issue. We suspect that the mentioned packages are outdated in your package.json file. We have updated the necessary packages in the application and created a sample application for your reference. It can be downloaded from the following link.
https://www.syncfusion.com/downloads/support/directtrac/general/ze/Maps-1025419634.zip
In the above angular sample, we have rendered a world map with GeoJSON data.
Please let us know if you need any further assistance.
Regards,
Sabari Anand
QUESTION
I have been working on a simple single-page-app that displays data on a world map using GeoChart. Everything was working fine and I was able to view the map for almost 3 months of working on the app until all of a sudden my map stopped showing up when I test my app in localhost, despite making zero changes to the geomap vue component
Upon clicking on "inspect" -> "network" I can see the error below (please see screen shot)
I have created a simple replica of my vue component using codesandbox here for your convenience to reproduce the error https://codesandbox.io/s/sharp-goldberg-djdfi?fontsize=14&hidenavigation=1&theme=dark
I am a complete novice in front-end, Vue and JS, so please go easy on me!
...ANSWER
Answered 2020-Sep-02 at 01:07This was due to a change with Google Charts. Upgrading to vue-chartkick 0.6.1 will fix it.
More context: https://github.com/ankane/chartkick/issues/543
QUESTION
I have two structs:
...ANSWER
Answered 2020-Aug-28 at 13:48In this example there are always 0 points in the struct.
Despite the fact there are 0 points in the struct, your code writes to the 1st, 2nd, 3rd, 4th and 5th points, thus overwriting some memory that doesn't belong to you.
So you can get the number of points by using the number 0.
If you want to allocate a map with some points in it, you can do so like this:
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