I am a total newbie so this may be a silly question, but I can't find any tutorials on how to query overpass api to display things on own website. Do I install it on my server or is there a code to query it in the script?
What I want to achieve is to have a searchbar on one page to search for tags, and that would display one random point with that tag on the other page with a leaflet map.
But I am struggling to even display any points on it. Would it be actually better to have a local geojson file with set list of points in one town if I want to limit them to just this town anyway?
I will be grateful for any help, it's a first time I am doing something like this and it horribly stresses me out
You can visually run and try overpass queries using http://overpass-turbo.eu/.
In order to unload the overpass server, it would be a good idea to fetch the data once (and update regularly) and host them on your own server (also pay attention to the terms of use of the specific APIs, they might limit the number of requests per hour or prohibit using the for autocomplete).
To query the server from an application, GET from https://overpass-api.de/api/interpreter?data=, followed by your request (the same you would type into overpass turbo, just without line breaks).
It is also possible to host an overpass instance on your own.
If you need to learn the Overpass Query Syntax first, you can read the docs.
Related
I am working on a web application for a client that uses a postgresql database. I want the client to be able to go to a certain area of the site where the data from the database is displayed in graph form (for example, sales figures over a 6 month period). Is there a plugin I could use for this (I don't have any experience of this, so an easy one, or one with tutorials available would be great). I had a look at BIRT, which says it has a web based option but I couldn't really figure it out. I don't want the client to have to download and go through another program, I just want them to go to a url within their site, and it's all just presented to them there and then.
Any sort of pointers in the right direction would be greatly appreciated.
Thank you.
HighCharts, at http://www.highcharts.com/, works well for this case -- I use it fairly often. It supports Ajax data feeds in JSON format, so you can write an endpoint which returns the JSON representing the data from Postgres and which gets called from a JavaScript function which creates the graphs using that data (you would place that call in a ready function).
Also, if you're using Postgres 9.3 or higher, it supports JSON natively, so you can do the JSON conversion in the SQL query itself, as opposed to post-processing the results in your Python or other backend code.
Highcharts is reasonably flexible and allows for a variety of nice-looking, functional charts and graphs. If you want to get much fanicer, d3 may be worth a look. These are some the types of graphs/charts it can do: https://github.com/mbostock/d3/wiki/Gallery
I have not used d3 myself, however.
For the scenario you described above, Highcharts seems like it would work just fine.
It's been a while, and a lot has happened since 2016. There is now ChartJS as well - http://chartjs.org/, for example, which is easier to use than HighCharts and very flexible (I've used both).
What they both don't do is dynamic data. If you want that your client decides which data he wants to watch - that part you need to write yourself.
I am building a web app that pulls data through the Core Reporting Api v3 from Google. I am using the client PHP library offered by Google.
I am currently trying to specify a page and retrieve its pageviews for a time range. Every other seems to be working okay except for the fact that if a specfy a filter with ga:pagePath==http://link/uri then I get 0 all the time no matter the time range.
I think the problem is got to do with the setting of value for this pagePath. I want to have spearate data for the desktop version of the site and the smartphone version denoted by s. subdomain
Can anyone hint me on some tips and or tricks to use to get the required data?
Example URL:
http://domain.com/user/profile/id/1
http://s.domain.com/user/profile/id/1
Thanks in advance!
for the the default implementation of Google Analytics, ga:pagePath doesn't include the scheme or hostname so in your case you'd actually want to filter using ga:hostname and ga:pagePath together.
I suggest you use the Query Explorer to build your queries and get familiar with what will work. You can also use this tool to at least get a sense for what type of data the ga:pagePath and ga:hostname dimensions return before trying to filter on them. Finally, once you have the query you want, you can easily get the exact Core Reporting API query by clicking on the Query URI button.
Also check out the Combining Filters section of GA API docs.
So if you want filter on ga:pagepath for domain.com and s.domain.com separately you could do something like
filters=ga:pagePath==/user/profile/id/1;ga:hostname==domain.com
filters=ga:pagePath==/user/profile/id/1;ga:hostname==s.domain.com
I'm running some geospatial tests to demonstrate use of the MongoDB geo APIs. The problem is that I don't have a list of valid addresses with which I can test.
The idea is to query the latitude and longitude through Bing Maps as my sample application is a job search website where the locations I will be indexing to query against would be entered as listing for new job opportunities and would be entered using addresses rather than latitude and longitude coordinates.
Any help would be much appreciated!
I don't suspect Microsoft provides a list of fake locations that will register to valid lat/long coordinates on Bing (for this exact purpose or similar), but if they do...that would be equally acceptable.
FWIW, I did thoroughly check Microsoft's documentation and found nothing on this.
Alternatively, I could just query common places like Starbuck's or POI's (probably what I'll end up doing), but it would be nicer if there were a testing mode where you could use addresses that would register with Bing. Microsoft, in case you happen to subscribe to Stack Overflow tags, I would post this suggestion on the Bing community forums but there is no way to post an answer or question there, please fix this.
Decided just to use the Bing Maps API to query some popular companies although this is not ideal.
I am playing around a bit with openstreetmap data.
What I want to get is the closest "road" (i.e. way with tag 'highway' set to certain values) to the users position.
At the moment I use the API to query all Objects in a square around the user and then parse all the way elements, check their tags, check their distance to the user and so on
But that doesn't sound to elegant to me.
Is there a better solution ? maybe through the API or by installing the openstreetmap data in a local DB somehow to be able to query that directly ?
would be great if someone could point me to the right direction.
Thanks in advance.
please use "Read-Only Data APIs" for getting Data.
You must not use the "editing API" for read-only purposes or projects.
(see Terms of use)
For your purposes I would use OSM Server Side Script
I want to get zip code from users current location(Latitude, Longitude), I had used MKReverse Geocoder delegate methods, but sometimes I am not able to get zip code information based on latitude & longitude (valid values). Are there any other alternatives for MKReverseGeocoder ? ZipCode database are specific to countries, that's why I don't want to use them. Any other idea or clue?
Thanks
Consider the GeoNames web service. It's a complete geocoding/reverse geocoding suite under a Creative Commons attribution license. You can either download their data, or hit their web service. The best thing is, they don't require any API keys or licensing silliness--you just hit their web app and bang you got data.
Here's an example: http://ws.geonames.org/findNearbyPostalCodesJSON?formatted=true&lat=36&lng=-79.08 That'll return you a JSON object for the zip codes around the Chapel Hill, NC area.
It's also international. Here's Seaford, England, and the only difference is the lat/lng pair I'm sending: http://ws.geonames.org/findNearbyPostalCodesJSON?formatted=true&lat=50.5&lng=0.08
Then you need to learn to make web requests and parse JSON (if you don't already have a grip on those things), and you're all set.
This is actually a tricky question. Using a geocoding solution like GeoNames is likely to lead to major errors for a lot of queries. The reason for this is that GeoNames by looking up the record in their database that is closest to your query point and then returning the ZIP code they have on record for that point. This works great when your query point is right on top of a record in their database, but can lead to errors otherwise. For example, if their nearest record is a few blocks away in a different ZIP code, you'll get the wrong answer.
The US Census Bureau has created maps of the ZIP codes:
https://www.census.gov/geo/reference/zctas.html
Please see their notes on that page.
I have also worked on a project that uses the Census maps to provide an API that gives back the ZIP code for a given latitude and longitude. It is at:
http://askgeo.com
We offer both a web API and a Java Library that you can run on your own server. The library has excellent performance. Since our site offers additional information than just the ZIP code, you can read about our ZIP code service here:
http://askgeo.com/database/UsZcta2010
And you read about the documentation for the Web API here:
http://askgeo.com/#web-api
The GeoNames methodology is fundamentally flawed for this type of query. If you are looking for the polygon that contains a given query point, you need a map with the polygons, and you need a spatial index to provide fast look-ups. GeoNames has neither. AskGeo has both.
If you have a free db (available from that site? Just search for zip code database and you'll see it)
then you can run an internal SQL query testing for nearby lat/longs. That way you won't need to worry about licensing a web service.
You have three options then. SQL BETWEEN statement, the hypotenuse equation, or Haversine. Haversine being the best, luckily it's tutorial'd elsewhere
EDIT:
Couple of other options I've seen recently:
http://developer.yahoo.com/geo/placefinder/guide/index.html
http://jamiethompson.co.uk/projects/2010/04/30/an-open-free-uk-postcode-geocoding-web-service/
http://www.postcodeanywhere.co.uk/geocoding-service/api.aspx
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Take a look at the Google Maps API - Reverse Geocoding (only useful if embedding results in a Google Maps interface).
Sample code here:
Get Zipcode from results[1].formatted_address
https://developers.google.com/maps/documentation/javascript/examples/geocoding-reverse