I need to draw a heatmap in my MAUI Blazor application. I tried to do it with a canvas, but because the window and therefore the canvas is resizable, I need an axis with scalable labels (so that they don't overlap).
I searched in the internet, but did not find any way to get the real size of the canvas element or any other html element (i am using Blazor.Extensions.Canvas).
Is there any way to get the element dimensions or is there already a library for graphs in .NET MAUI Blazor which works for me?
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A client would like to add their URL as a brand/watermark within a MapBox tiled vector layer in MapBox Studio, so that the watermark appears wherever the tiled vector layer is displayed. (One possible use-case is to discourage competitors from stealing that tiled layer in their own maps.)
Is it possible to add a watermark to a tiled layer in MapBox, and ensure that it's visible at least once in every view?
I tried adding a duplicate copy of a polyline dataset as a Symbol Layer, and labelling it with the client's URL using the Text Field option. This works but has the side effect of preventing the labels from appearing on the original copy of the line layer.
It is not possible to add a single occurrence of a watermark to a map style in Studio in the way that the Mapbox watermark is displayed on a map, but there are alternative approaches to achieve what you are looking to do.
If the underlying goal is to prevent competitors from using a particular map style (and hence an underlying tiled layer), the best approach is to set scopes and URL restrictions on the Mapbox access tokens being used to access the map style in a public environment. You can find more useful information about token management and access tokens in general in the Mapbox documentation. This approach could be used in conjunction with adding a branded "watermark" on the client side -- for example, placing a fixed div in the corner of a web map loaded with GL JS. Although this watermark obviously isn't included in the style itself, setting a URL restriction on the access token used to load the map would prevent others from accessing the same map with that token on other domains.
You could also experiment with adding a low-opacity background-pattern to relevant layers in the map style itself. This property could be used to mimic a traditional watermarked effect, where a particular logo is placed on an image at multiple regular intervals.
I'm using Leaflet + CartoDB; I've also used Leaflet + Mapbox; and there may also be some Leaflet + GoogleMaps in my future.
My customer asked me this question: where do the Leaflet layers get painted onto the tiles? Is that done by Leaflet? Or by the Tile engine?
Does this change if I'm using a "regular" map engine (such as Mapbox) or if I'm using something like the KML-rendering plugin?
where do the Leaflet layers get painted onto the tiles? Is that done by Leaflet?
By default (unless you're doing something weird), that happens in your web browser, which is compositing DOM elements on top of each other. You can check this by using the developer tools in your browser and inspecting the DOM elements for the tiles, and the <canvas> or <svg> with your vector geometries. They are separate DOM elements, thus your browser is doing the compositing.
Does this change if I'm using a "regular" map engine (such as Mapbox) or if I'm using something like the KML-rendering plugin?
Not really. Mapbox-gl-js uses insane amounts of WebGL, so that means that the brunt of the workload moves from the browser's compositor to a WebGL stack. It still happens in the web browser, albeit in a different part of the browser.
There is no "KML rendering plugin" for leaflet, just KML loading plugins. Vector geometries are still rendered in a <canvas> or <svg> separate from the image tiles for the basemap, then composited.
You can, of course, run your own tile server (with software such as Geoserver, Mapserver, Mapproxy, mapnik+mod_tile, tirex, tilestream, or dozens of others). In that case, you obviously know you are rasterizing your data into tiles.
I have created a level editor using new UI system in Unity3D.
Using Level Editor:
I can drag the ui elements,
I am able to save them in scriptable objects
But how could i save and load them at runtime?
I mean, if i create a level with some {width x hight} resolution and if i load it on different resolution, then the whole UI positioning get distorted.
How could i anchor them correctly programmatically?
Any help would be appreciated.
There are good video tutorials about the 4.6.x UI here:
http://unity3d.com/learn/tutorials/modules/beginner/ui.
Especially for positioning the elements I recommend watching: http://unity3d.com/learn/tutorials/modules/beginner/ui/rect-transform.
I suggest you learn how to use the anchor correctly first. If you want to change the position and size of UI element in a script you can do that through the RectTransform component. It offers functions like offsetMax,offsetMin and sizeDelta for position your UI element. The functions you need to use depend on your anchor setting.
as LokiSinclair said. You just need to Adjust the Scale that the new UI provided. It is the four Arrow on the Canvas of each Object and every UI object is inheriting their scale behavior from their Parent.
As a console app, I'm creating maps with Bing Maps, with lat/lon and pushpins. Saving as a jpg. Everything is working great. NOW, however, I'd like to draw a polygon layered on said map[s]. It seems this might not be possible; I cannot find the answer. Dynamic via web page it seems is the only way; I need it to happen with a console app.
The custom polygon as well as custom polyline are not supported features on the REST service.
Since you're in a console application and as you're saving the image as JPG file, you can draw your own content onto the image using GDI or other technology to manipulate the image directly. Currently, there is no other way.
I have a web site that makes use of CSS box shadows. To make the web site look good in more browsers, I want to make use of semi-transparent PNGs instead. And to avoid having to redraw elements in a graphics program, I would like to know:
Is there a way to extract
semi-transparent elements from a web
page and store them in
semi-transparent PNGs?
One solution that I could try if I hadn't borrowed my Mac to a friend: print to PDF from Safari. If I'm lucky, then the PDF has all the elements stacked in layers.
You can render DOM elements to canvas via SVG and XHTML embedded in <foreignObject>.