Is there a way to incrementally draw a line in the Google Earth Plug-in using the JavaScript API?
If that's not possible, is there a round about method to achieve the same effect?
What I want to achieve is similar to this: http://www.wolfpil.de/v3/animated-poly_v3.html
Yes this is entirely possible, and to be fair it would be trivial to convert the code in the example to use the earth, rather than maps, api. All you would need to do is to find any references to maps objects and simply use the equivalent earth api objects. The math and timing is all done for you...
If you wanted to convert it take a look at the following links, they should give you everything you need to know.
Information on Geometries and Overlays
https://developers.google.com/earth/documentation/geometries
Example of Drawing line strings
http://earth-api-samples.googlecode.com/svn/trunk/examples/linestring.html
Example of Smooth Animation with frameend
http://earth-api-samples.googlecode.com/svn/trunk/examples/event-frameend.html
Finally, you could also just add the earth plugin to the maps implementation, take a look at the following example of Maps/Earth Integration. This would just mean adding the a few lines of code to the example you posted allowing the 'earth' mode to be activated from the maps api. If set up correctly things like polylines are available across the map/earth displays.
Earth Maps integration
http://earth-api-samples.googlecode.com/svn/trunk/examples/maps-integration.html
Beefy integration example
http://earth-api-samples.googlecode.com/svn/trunk/demos/mapsapi/beefy.html
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So, basic gist is, I have my own tiles of not the real world I'd like to display with the Google Maps viewer. I've found examples of how to split an existing single image into tiles for use with it, but nothing that deals with setting up your own tiler.
I have map data such as this:
https://dl.dropboxusercontent.com/u/44766482/superimage/index.html
Which right now is just a bunch of 1600x1600 images in an html table. This naive method works, but I'd like to switch to the more robust google api for better zooming and smarter streaming of the image data.
I've been unable to find a good example of how to generate your own tiles for the zoom levels and bring it together with some html/js.
If you want some more information for the goal process;
I have a python script that can output any size tiles of the map, at any zoom level. I'd like to bundle those together into a google maps api website. But in my own efforts I have not found a good example or documentation of how to do that. For one, I can only find examples of how the zoom levels work for the real world map, but not for a custom one.
Edit:
Got most things working as I want them, but I'm still confused regarding the "center" that can be set, as it's in lat and lng, which don't apply. I'd also like to set boundaries as currently it tries to load .png files outside of the maps range.
My current progress:
https://dl.dropboxusercontent.com/u/44766482/googlemapspreview/index.html
I think what you are looking for is the google maps imageMapTypes:
https://developers.google.com/maps/documentation/javascript/maptypes#ImageMapTypes
Basically, each zoom level is the 4 lower zoom tiles combined. A Projection function can be skipped to get orthogonal mapping.
We've been working with several libraries like GoogleMaps, OpenLayers, ModestMaps... Even we've written a cartographic visor (Java Applet) that dealed with WMS servers several years ago. Of course this visor is currently useless.
Now we want to develop one FULL HTML5 visor because we're having lots of trouble dealing with the most common frameworks (performance, licensing,design ...). We build advanced and technical maps applications for GIS expert.
We want to draw vectors inside a canvas element. We don't want to draw a canvas object over the base map (like we can do with GoogleMaps ...) , we've been dealing with that and it's not the best way, we need a base object as a canvas HTML5 object in which draw directly.
The question is: Is there a free library that renders on a canvas object which we can extend?
If I understand your question correctly, you want a maps API that will draw the map using html5 canvas. It looks like https://github.com/dfacts/Slippy-Map-On-Canvas/ uses the Open Street Maps API to get map tiles and then draws them on the canvas. Is this what you're looking for?
I think this could be the answer: http://leafletjs.com/. This library does everything that we want, it draws vectors on canvas or SVG, draws tiles maps, good integration with geojson and more...It is far and away the best choice.
Certanly this library doesn't use a unique canvas object, but it's even better.
I wanted to ask you about the way to make spatial interpolation in google maps API. This means- I have values for some points inside an area and want to recalculate values for every point in this area (and create an raster overlay).
In "offline" GIS softwares, there are more methods to do this. For example Kriging (http://en.wikipedia.org/wiki/Kriging).
Thanks for answer
There is no real practical way to do such a thing. Spatial Interpolation is something you really need a full-blown GIS to accomplish. It requires storing, analyzing, and presenting data in way that ArcGis or QGis is best suited for. There is some new feature in ArcGis Online that works with Google Maps API but I don't know much about it and am unsure if it would be any help for you but a link is here.
I know, its not something geostatiscically correct, but I have made this:
- I have created a net of rectangle polygons.
- I have connected all my points to polygon they lie and have made mean value for polygons with at least one point
- I have checked every polygon without points and at least 2 neighbourly polygons with points, and have made mean from this neighbourly values
- I have checked again all my polygons with values and at least 2 neighbourly polygons with values and smoothed origin values according to the neighbours´ values.
I am attempting to make a simple PhoneGap app that will allow a user to input lat/long points and bearings and calculate their estimated intersection, along with a measure of error. I would like to display the lines, intersection, and an error elipsoid on a map or at least a grid of latitude and longitude lines, so the user can visualize the accuracy of the point. The tricky part is that this will be used for wildlife tracking in areas where the user may not have cell service. Is there some sort of Javascript plugin that will make a lat/long grid available for me to draw georeferenced lines and shapes on? I would love to use something like the Google Maps API, but that clearly won't work for offline use. I've Googled quite a bit, but I'm not sure where to start with this or if it's even feasible at all.
This program is similar to what I'm trying to achieve: http://www.locateiii.com/
Any ideas are greatly appreciated.
I'd use d3.js and http://code.google.com/p/gmapcatcher/ something like this where you can keep the google maps offline. If that's not feasible you can always us D3 with a svg of the map.
I ended up using OpenLayers with OpenStreetMap tiles prepared by Maperitive. Simple and works well with PhoneGap.
I'm learning three.js, now I can write demos like a cube which could be moved by the mouse.
What I'd like to do next is a Google Earth in browser which will use Google Maps API to get the images and render them on an earth in the browser.
But I don't know where to start, I've seen the document of three.js but it just list the API names and parameters, without explain of what they do...
My question is, which part of three.js should I learn to accomplish what I want?
I know it's been a while, but were you looking into doing something like Panedia where the images update depending on user's location on the map?