NOAA stopped their Seamless Raster Navigational Chart Services URL this year. I was using it in a simple leaflet.js project, and need a replacement or update.
Going through the various documents on using their new vector data gets me lost very quickly. Is there a "simple" workaround? Or a suggestion or pointer to simpler documentation that doesn't require significant GIS knowledge? Or an alternative service, similar to Open Street Maps but more nautically focused?
Thanks.
Related
The time taken to load the charts(visualization) using tableau in my mobile app is close to 10 or 15 secs. So i am looking for alternative methods like creating my own chart but only to use the intelligence tableau provides on creating the visualizations.
In short, i want to know whether there is some support or API available from tableau using which i can draw the visualizations by myself in my mobile app without losing any chart data or functionality like digging deeper in charts.
For example, an API from tableau using which i can create the chart in my mobile app. After creating it, if user touches any data that should be sent again to tableau to get further event action like showing filters/tables etc.
Is this even possible? I did lot of research in tableau and got to know about tableau SDK, tableau API's, tableau extensions etc. but unable to find what i am looking for.
Tableau provides a thorough white paper Designing Efficient Workbooks. I would start by reading that and trying some of the recommendations.
If you are looking for an API driven visualization system, you can check out MuzeJS.
You load your data in an in-browser DataModel, run relational algebra enabled data operators to get the right subset of data, and then just pass to Muze engine, which automatically renders the best visualization for it.
It is similar to the kind of intelligence Tableau provides but since it is a developer first API, you can customize as you want, whether it be for the mobile or the desktop. In fact, most of the charts will be available for both seamlessly.
Any changes to data (including application of data operations) automatically updates the visualization, without you having to do anything else.
Add to that, if you’ve to connect multiple charts (for cross-interactivity, drill-down etc.), you’ve to manually write the ‘glue’ code. With Muze, all charts rendered from the same DataModel are automatically connected (enabling cross-filtering). It also provides composability and the ability to facet your visualization, providing a multi-grid layout.
You can go through some of the examples and the documentation to see if it suits your needs
I have a GeoJSON file of fly tip incidents that have happened over the last year which is updated regularly.
I am looking for a solution where I can add this data onto a map and symbolise it to show one marker for incidents that have happened over the last month, another for between 1 and 3 months, and a final marker for any incidents from over 3 months ago.
I have thought about using one of MapBox, CartoDB or Leaflet, do these libraries have the capabilities to be able to style data in this way? I want to keep my data locally so do not want to load it into an online account.
I'd like to know if this can be done with one of the above.
Thanks
MapBox and CartoDB services are built onto Leaflet library. You can use them for everything (including uploading your data), or just for the background map. So even with them you can keep your data locally.
Leaflet is the sure choice for total control of your data, as you will be doing all the operations yourself.
Note that you also have other libraries that provide you with the same control with that respect, like OpenLayers, and D3 to some extent.
As for displaying different markers based on age of your data, there is no special difficulty in doing so.
Does OpenStreetMap just provide GIS data? To render maps and have a browser based UI to show maps with data, would a developer need to use something like Mapnik?
OpenStreetMap provides data yes, and you'll need specific tools to make map with them. You first need to put the data in a true GIS format, which OSM is not. Think about PostGIS, an osm2pgsql tool is designed for that. Then, you'll need a rendering tool, i.e. a cartographic engine. You can use Mapnik or MapServer. Tilemill or Kosmtik can help you designing your map styles.
Take a look here.
yo can export data form OpenStreetMap and render your own map.
Take a look at
http://www.slideshare.net/jones139/rendering-openstreetmap-data-using-mapnik
http://www.slideshare.net/artemp/mapnik-sotm-2007
There's a fuller list of rendering libraries for OpenStreetMap data here, both free and commercial.
http://wiki.openstreetmap.org/wiki/Renderer
Disclosure: I am the developer of one of them.
OpenStreetMap provides map data out to a wide sprawling ecosystem of different downloads and tools offering developers different map-making and map using possibilities. Here is a diagram I drew which captures some of this:
So the data comes out of the core of OpenStreetMap, in the form of 'planet downloads', one big unwieldy blob of XML (and diffs), but from there it fans out into a range of other offerings to developers, many of which are provided by 3rd parties. Taken together "OpenStreetMap & Friends" provide lots of possibilities.
If you are inclined to run your own rendering system, then yes, Mapnik is a good choice. Powerful and scaleable (most successful OSM tile servers run Mapnik), but takes a bit of setting up. You normally load OSM XML data into PostGIS, and run mapnik from that (tutorials on switch2osm.org)
If you are not inclined to run your own rendering system (for more lightweight web development tasks this seams reasonable!) you don't have to! You can configure LeafletJS or OpenLayers or others to fetch map tiles from a tile server run by somebody else. There are many providers. See the providers list on switch2osm.org and the Tile Servers list.
I would like to write a navigation software for windows phone 7 that is available without being on the internet. Therefore, I would like to download the map information from Bing maps. Not the entire world or country, just a small city - because this software is just for me and I only need navigation within my home town.
What I basically need is something similar to the map export that OpenStreetMap offers. I could not find anything equivalent on bing maps, so I wrote a program that queries bing maps (through the API) for routes. It then saves intersections and thus builds a graph. This technically works and I get a lot of streets, but sometimes bing leaves out a single intersection. In that case, my data will become invalid.
So I was wondering if there is any way of asking the API directly for a map export, returning something like an array of streets that is within a certain boundary rectangle. (Or something similar)
Thanks for your help
No, there is no standard API call in Bing Maps API that will let you do this.
Downloading all the street data within "a small city" would violate the terms of service. See 8.2(r) at http://www.microsoft.com/maps/product/terms.html.
If you want that data, you can try OpenStreetMap or else you would probably have to license the data from a commercial provider of such things which is no doubt very expensive.
I was looking at the Bing Heat Map Creator here.
It looks pretty cool, but I wanted to build something a little more dynamic with it. Unfortunately it appears as if the only way to use it is by uploading a CSV file manually. Does anyone know of another way to get the data loaded into this?
Thanks.
We developed the Bing Heat Map Creator, which is a Map App running on the Bing Maps platform. It is certainly possible to build similar heat mapping features in a more automated mapping application but likely would not be done as a map app due to limitations with map apps APIs. Ping me if you want to discuss further.
Regards
Steve