I have searched for this but not able to get clear instruction to extract data from an WFS data. I have seen the schema but i am not sure how to call these in C# code.
I want to be able to consume the data and extract the XML and read the XML data to get some fields. But there is no clear approach for this available.
Any sample code would help. I would like to refrain from using any libraries and would like to use only standard inbuilt libraries.
Thanks.
Shankar
I, too, am at the beginning of the WFS journey. So welcome! Some of the resources I have been looking at are:
https://www.ogc.org/standards/wfs - Here you can look at the standard specification, etc.
https://en.wikipedia.org/wiki/Web_Feature_Service - Basic WFS information and links
https://www.weather.gov/mdl/webservices_wfs - United States National Weather Service - WFS Information
https://github.com/SharpMap/SharpMap - SharpMap.Net Library for requesting data from WFS services
Good luck. If you find a link with good info, please post it here.
-Joe
Related
I have setup my application for REST access as per documentation. The default routes are working well. I am able to retrieve, update and delete records, however, I am not sure how I could filter data sending parameters to the controller. I wonder if I can do that using querystring or if there is a better way to accomplish that. Please can someone give me directions?
Reads about the Request object in the manual. And use the Search Plugin for filtering.
The search plugin comes with a lot of documentation that explains how to use it as well.
Your question is so generic that a proper answer would end up in a whole article - which I'm obviously not going to write, there is enough information available on HTTP requests and query params. Use Google or read these links:
https://developer.mozilla.org/en-US/docs/Web/HTTP/Messages
https://www.w3.org/Protocols/HTTP/Request.html
Call me crazy, but I'm looking for a service that will deliver autocomplete functionality similar to Google, Twitter, etc. After searching around for 20 min I thought to ask the geniuses here. Ideas?
I don't mind paying, but it would great if free.. Also is there a top notch NLP service that I can submit strings to and get back states, cities, currencies, company names, establishments, etc. Basically I need to take unstructured data (generic search string) and pull out key information with relevant meta-data.
Big challenge, I know.
Sharing solutions I found after further research.
https://github.com/haochi/jquery.googleSuggest
http://shreyaschand.com/blog/2013/01/03/google-autocomplete-api/
If you dont want to implement it yourself, you can use this service called 'Autocomplete as a Service' which is specifically written for these purposes. You can access it here - www.aaas.io.
you can add metadata with each record and it returns metadata along with the matching results. Do check out demo put up on the home page. It has got a very simple API specifically written for autocomplete search
It does support large datasets and you can apply filters as well while searching.
Its usage is simple - Add your data and use the API URL as autocomplete data source.
Disclaimer: I am founder of it. I will be happy to provide this service to you.
I am trying to combined data from multiple sources like RDBMS, xml files, web services using Marklogic. For this as I see from MarkLogic documentation on Metadata Catalog (https://www.marklogic.com/solutions/metadata-catalog/), Data Virtualization (https://www.marklogic.com/solutions/data-virtualization/) and Data Unification it is very well possible. But I am not able to get hold of any documentation describing how exactly to go about it or which tools to use to achieve this.
Looking for some pointers.
As the second image in the data-virtualization link shows, you need to ingest all data into MarkLogic databases. MarkLogic can then be put in between to become the single entry point for end user applications that need access to that data.
The first link describes the capabilities of MarkLogic to hold all kinds of data. It partly does so by storing them as-is, partly by extracting text and metadata for searching, partly by conversion (if you needs go beyond what the original format allows).
MarkLogic provides the general purpose MarkLogic Content Pump (MLCP) tool for this purpose. It allows ingesting zipped or unzipped files, and applying transformations if necessary. If you need to retrieve your data from a different database, you might need a bit more work to get that out. http://developer.marklogic.com holds tutorials, blogs, and tools that should help you get going. Searching the MarkLogic Mailing List through http://marklogic.markmail.org/ can provide answers as well.
HTH!
Combining a lot of data is a very broad topic. Can you describe a couple types of data you'd like to integrate, and what services or queries you would like to build on that data?
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
--
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
There seems to be no available documentation for the Objective-C client for the Google Data API. Google's API help webpage only has options for .NET, Java, Python, and the HTTP Protocol. I want to access data from a spreadsheet on my Google Docs account, and then add new data.
I have added the correct source codes to my project as outlined in the GData Wiki, and am now completely lost. There are a ton of classes to sort through for Spreadsheets, and there are very few comments and I can't really tell by method names what does what.
If possible, can someone post a couple snippets of code to first access the available documents, then pick one of the choices, and then add information to a cell (like A1)?
Thank you in advance for your consideration!
Did you look at the spreadsheet sample?
http://code.google.com/p/gdata-objectivec-client/wiki/GDataObjCIntroduction
A year or so later, a page for just this: Google Data APIs Objective-C Client Library
Generally, to create a new entry, you'll use an http POST to the feed's postLink. The Obj-C library service class provides POST operations as the method fetchEntryByInsertingEntry:
I believe creating a new spreadsheet still requires uploading a new document, as mentioned in the docs. You could create a simple CSV text file and upload that as a spreadsheet.
Note that there is a discussion group for users of the library.