i am new to KML and this should be simple but i can't figure it out.
In my KML i have several styles defined and can assign them easily to a specific placemark with the styleUrl-tag. My styles differ only in the background-color from each other but they also contain a rather complicated "BalloonStyle" which is the same for ALL of them.
Now i don't want to copy this same ballonstyle into every style i have and increase the size of my KML.
What i need is to assign to a placemark two styles like i would do in CSS:
<styleUrl>#greenArea #myBalloonStyle</styleUrl>
<styleUrl>#redArea #myBalloonStyle</styleUrl>
Or write into my style something that it "inherits" its balloon-style from a second style.
Thank you in advance
A KML feature can only contain a single styleUrl with a single style reference but the feature can also contain an inline Style element. This technique is called a "merged" style.
In the case where a feature has both a shared style and inline style, the shared style is applied first then the inline style overrides whatever is already specified in the former.
If you use the BallonStyle as a shared style then you can override specific elements such as color in the inline style.
<Placemark>
<styleUrl>#myBalloonStyle</styleUrl>
<Style>
<LabelStyle>
<color>ff0000cc</color>
</LabelStyle>
</Style>
</Placemark>
Here's a complete example with a global BalloonStyle. Click "Raw", save contents to a local file, then open in Google Earth.
Related
I have a number of different SVGs to include in my project (Angular 10).
Some of them are used multiple times with different sizes and fill colors etc.
I am trying to find a way to reference them in my html code and have access to via styling:
CSS:
.svg {
fill: red;
}
Referencing:
<svg>
<use></use>
</svg>
<object></object>
<img></img>
<embed></embed>
As yet, I have not been able to find a solution that allows me to reference them but also have the ability to access the fill property in the SVG itself as i can when adding inline.
Inline:
<svg>
<path>
</path>
</svg>
Adding them inline is going to be messy.
How is this usually handled?
Your help is appreciated!
You can't. CSS does not apply across document boundaries. If the CSS rules are in the HTML (or imported into the HTML via <link>) then it cannot affect the content of external files.
One solution people have used in the past is to use a bit of Javascript to inline SVG files at runtime.
Otherwise, you will need to put the CSS in the external SVG itself.
Based on the code snippet below (and found here), the material library is styling the component based on the text content of mwc-icon. After looking at the source code for mwc-icon found here, there doesn't seem to be any javascript logic doing the styling directly. Somehow this seems to be happening in the css or in the font definition itself.
How is the icon being applied/rendered in place of the text?
<link href="https://fonts.googleapis.com/css?family=Material+Icons&display=block" rel="stylesheet">
<mwc-icon>shopping_cart</mwc-icon>
<script type="module">
import '#material/mwc-icon';
</script>
The answer for your question is that the font-family property set in the file.
You have imported the Material Icons font and used it. There is where the icon name you enter is defined. Instead of character definitions icon names are defined and mapped to the corresponding svg or png images.refer here
https://developers.google.com/kml/documentation/kml_tut
KML uses a tag-based structure with nested elements and attributes and is based on the XML standard.
So, KML is basically a "text" file, it doesn't contain the maps.
How does Google Earth use KML files to show maps? Does it treat KML file as an "index" to know which of its maps to pick when user presses x button?
KML is an XML language used to annotate the Earth with points, lines, polygons, 3d models, and overlays.
As an analogy, HTML is a language to structure and represent textual information and multi-media in a 2-D document context within a web browser. Likewise, KML is a language to structure and represent geospatial and temporal entities on a map and show in "earth browsers" such as Google Earth.
Specifically KML allows you to :
Specify icons and labels to identify locations on the surface of the planet
Create different camera positions to define unique views for geographic features
Define image overlays to attach to ground or screen
Define styles to specify KML feature appearance
Organize KML features into hierarchies
Locate and update retrieved KML documents from local or remote network locations
KML is a structured format of data that tells Google Earth how to display the data (point, line, icons, colors, styles, etc.) and where to draw it (longitude and latitude optionally at a given altitude). KML is simply a data exchange format.
Here's a simple KML file:
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document>
<Placemark>
<name>New York City</name>
<description>New York City</description>
<Point>
<coordinates>-74.006393,40.714172</coordinates>
</Point>
</Placemark>
</Document>
</kml>
As an "index", a KML file by default will load at the center point that covers all includes features in the KML, but that can be overridden if a LookAt or Camera is defined. If you click on a Placemark it will fly to that feature as defined by its coordinates.
Clicking on such a placemark in Google Earth will fly to that location, which for the example above happens to be New York City.
KML is a "text" file that can also be packaged and distributed in a "KMZ" file, which is a ZIP file with .kmz file extension.
More details about KML can be in the OGC KML Standard # 07-147r2 .
I have developed the following network link for dynamic updates :
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<NetworkLink>
<name>Loads TEST.kml</name>
<Link>
<href>/home/desktop/farhan/test.kml</href>
</Link>
</NetworkLink>
</kml>
Test.kml file has two placemarks.
My network link file is getting successfully updated on changes in Test.kml file
Now what I want to do is to place an 'IF' condition so that if a certain thing is true then placemark color is 'Green' Else 'Red'.
What should I do here ?? Is there any Java API I need to follow.
Depends how/where you want to host the KML and what those conditions are.
If the styles and conditions are static then you can generate the KML pre-set with those styles as part of the KML. For example, if you want to generate the KML based on some conditions such as population size > 100K => red, size > 50K => blue, otherwise white where each generated Placemark would have the appropriate shared share or inline style.
One popular Java-API to generate KML is the Java API for KML (or JAK for short).
If the views (based on conditions) are "dynamic" and user-selected then you have a couple of options:
Generate different versions/views of the Placemarks based on different conditions with NetworkLinks and radioFolders to load a particular view. The KML could be statically generated once or dynamically via a web-service, servlet, CGI-script, etc.
For example, the USGS has an earthquake real-time feed with multiple NetworkLinks each with a different view/color/size scheme for the same data (e.g. color by age vs magnitude).
Check out http://earthquake.usgs.gov/earthquakes/feed/earthquakes.kml
Use the Google Earth API to load, create, and modify KML in context of HTML and JavaScript with Google Earth running as a plugin in your web browser. This requires some JavaScript programming.
Use NetworkLinks as shown in your example combined with NetworkLinkControl elements to globally change the shared styles. See NetworkLinkControl tutorial. You can't add NetworkLinkControl elements to your KML directly in Google Earth so you have to author your KML manually or programmatically.
use php , if you are aware of it and generate kml with the help of your table and also you can use various plugins and JAK as told by jason above.
What you can do is :
connect your mysql db ( having latnlong ) through jdbc.
2 .Run a loop i.e while loop which will add placemarks as per the latitude and longitude and add other necessary element of kml like :
Element ristyle = doc.createElement("IconStyle"); // this will create an Icon.
make a new file through :
Result dest = new StreamResult(new File("file location"));
this will create your new kml file
-- place a condition here which will show your condition like a normal loop.
5 Make a network link and refer your kml file in this for manual updation.
I think this should work
Is there a way to globally apply the Sketch Styles to all controls within my SketchFlow application in Expression Blend 4 without having to apply the Style="{DynamicResource Foo-Sketch}" property to each and every control manually?
Generally spoken, I would like to make those styles defined in SketchStyles.xaml implicit.
You can probably apply the styles implicitly like this:
<UserControl.Resources>
<Style BasedOn="{StaticResource Button-Sketch}" TargetType="Button"/>
</UserControl.Resources>
You would have to do this for each control type you want to use an implicit style for.