I have a project that requires to determine the barangay (barrio/subdivision) of a location(latitude and longitude). Is there an API out there that I can use?
In the Philippines, an address must include a Barangay. An example format of an address would be like [House No.][Street][Barangay][City][Region].
I tried to search in Google Maps API and LocationIQ API but the responses doesn't include barangays.
Unfortunately, I had not found any Maps API that provides this data. But I do found a workaround for this by getting the polygons of all barangays from geojsonph (which is in GeoJson format), then checking if the coordinates is inside that polygon using getContainers() of geojson-geometries-lookup's library.
// getBarangay.js
import GeoJsonGeometriesLookup from 'geojson-geometries-lookup'
import geoJson from 'Barangays.json'
export default function(lat, long) {
const glookup = new GeoJsonGeometriesLookup(geoJson)
const point = {type: "Point", coordinates: [long, lat]}
const containersCount = glookup.countContainers(point)
if(containersCount == 0){
// no barangays found
return null
}else{
// coordinate is inside a polygon
let result = glookup.getContainers(point, options)
return result
}
}
The getContainers(point) will check all the given polygons inside the Barangays.json that contains the point, then returns the object in geojson format.
Then, if you want to get the name of the Barangay:
let long = 120.9725526
let lat = 14.5945641
let res = getBarangay(lat, long)
console.log(res.properties.NAME_3)
However, this solution is not that optimal since you need to load the Barangay.json everytime the getBarangay() function is called, and there's 42,046 barangays in the Philippines as of now (2020). It would still be best if there's an API for this and we can just send a coordinate, and it will give back the barangay where it belongs.
Related
First off, what do we call a dictionary with a format like this in iOS?
(
{
name = "Apple";
value = "fruit-1";
},
{
name = "Banana";
value = "fruit-2";
}
)
And for my main question. I somehow need to format a string of JSON, like this:
[{"name":"Apple","value":"fruit-1"},{"name":"Banana","value":"fruit-2"}]
into whatever that format is called (of the string above).
For context, the existing approach of my project uses CoreData where the Server response (which uses the mystery format above) gets saved locally as a String, and I want to follow that format.
EDIT: for more context, I really need to just get the first format into the database because a module of a project was built to read the data with that format (e.g. make use of NSString.propertyList()).
Using a library called ios hierarchy viewer, I can see the saved object in the device.
Original format, server json to db (core data) in Objective-C:
What I've been trying to do in Swift, server json to local using JSONSerialization:
First off, what do we call a dictionary with a format like this in iOS?
According to the documentation of NSString.propertyList(), that's a "text representation of a property list".
It's a wonky, non-standard pretty-printing obtained by calling NSArray.description or NSDictionary.description.
Here's an example that shows a round-trip of data:
// The opening `{` indentation is fucky, but that's how it's generated.
let inputPropertyList = """
(
{
name = "Apple";
value = "fruit-1";
},
{
name = "Banana";
value = "fruit-2";
}
)
"""
// The result is an `Any` because we don't know if the root structure
// of the property list is an array or a dictionary
let deserialized: Any = inputPropertyList.propertyList()
// If you want the description in the same format, you need to cast to
// Foundation.NSArray or Foundation.NSDictionary.
// Swift.Array and Swift.Dictionary have a different description format.
let nsDict = deserialized as! NSArray
let roundTrippedPropertyList = nsDict.description
print(roundTrippedPropertyList)
assert(roundTrippedPropertyList == inputPropertyList)
The second format you show is what you get when you display an object in the debug console. That's the output of the object's description property. It isn't a "JSON string", exactly.
If you want to convert your objets to a true JSON string, see below.
As Alexander pointed out, the first string in your question is the output from NSString's propertyList() function. The format looks quite similar to "pretty-printed" JSON, but it's different enough that it it won't work that way.
The `propertyList() function is a debugging-only function, and I don't know of an existing way to parse that back into objects. If that is the string that's being sent by your server, your server is broken. If that's what you see in core data when you log the contents of a field, it's probably a misunderstanding on your part.
To convert an object to pretty JSON, see this answer, where I created an extension to the Encodable format that implements a property "prettyJSON":
extension Encodable {
var prettyJSON: String {
let encoder = JSONEncoder()
encoder.outputFormatting = .prettyPrinted
guard let data = try? encoder.encode(self),
let output = String(data: data, encoding: .utf8)
else { return "Error converting \(self) to JSON string" }
return output
}
}
That should work for any object that supports the Encodable protocol. (And your object should.)
I am trying to retrieve the lat long for my geo location using a google api. This api accepts cell tower information. Irrespective of providing all the information I am not getting correct lat long.
https://developers.google.com/maps/documentation/geolocation/intro
Anyone used this API to find lat long? how much accuracy one should expect from the Geo location API of google?
Below I have extended this sample from google, to read Lat/Lng:
JavaScript code
function initAutocomplete() {
// Create the autocomplete object, restricting the search to geographical
// location types.
autocomplete = new google.maps.places.Autocomplete(
/** #type {!HTMLInputElement} */(document.getElementById('autocomplete')),
{types: ['geocode']});
// When the user selects an address from the dropdown, populate the address
// fields in the form.
autocomplete.addListener('place_changed', fillInAddress);
}
function fillInAddress() {
// Get the place details from the autocomplete object.
var place = autocomplete.getPlace();
// get latitude and longitude
// --------------------------
var lat = place.geometry.location.lat();
var lng = place.geometry.location.lng();
// other stuff...
}
And your address field in HTML
<input id="autocomplete" placeholder="Enter your address"
onFocus="geolocate()" type="text"></input>
Using Google Scripts, I have a program that retrieves the text from one account's tweets and uses it for various other things. It's been running for over a year with minimal issues, but now the tweets are being adjusted to 280 characters and I can't retrieve the second half of the tweet. I have:
function refreshing_v2() {
var service = getTwitterService();
if (service.hasAccess()) {
var url = 'https://api.twitter.com/1.1/statuses/user_timeline.json?screen_name=(redacted)&count=1&include_rts=0&exclude_replies=1';
var response = service.fetch(url);
var tweets = JSON.parse(response.getContentText());
for (var i = 0; i < tweets.length; i++) {
//Parse the tweet
var latest = new String(tweets[i].text);
var maxi_id = tweets[i].id;
var startpos = latest.indexOf("1: ");
etc, etc, continues doing stuff with what it's found.
This allows me to get the FIRST half of the text. What's retrieved looks something like "[Content of first half]...(link to tweet)"
How do I get the full text?
You need to add tweet_mode=extended to get the full text in the response. You may need to check the entities you receive to see if it is what you are expecting.
Documentation link - https://developer.twitter.com/en/docs/tweets/tweet-updates
Additionally, you will need to use full_text rather than just text
So:
//Parse the tweet
var latest = new String(tweets[i].full_text);
See the sample tweet at https://github.com/twitterdev/tweet-updates/blob/master/samples/initial/compatibilityplus_extended_13997.json
According to the documentation, it needs to follows the Form Post rules at: https://www.w3.org/TR/REC-html40/interact/forms.html#h-17.13.4. When looking at that information it did not give me much to work with in terms of complex objects or maps.
Right now, If I have a list for example: Each item in the list needs to be stringified.
var params = {"list": [1,2,3]};
// needs to be stringed.
params["list"] = params["list"].map((item)=>item.toString()).toList();
Simple. Also all base items need to be a string as well
var params = {"number": 1, "boolean": true};
params = params.forEach((k,v)=> params[k].toString());
But how do we handle maps?
var params = {"map": {"a":1,"b":"foo","c":false,"d":[]}};
// ??
It seems that after testing in my app and in dart pad, you need to make sure everything is strings, so i am trying to come up with a way to effectively cover lists, maps, and maybe more complex objects for encoding.
var params = {};
params["list"] = [1,2,3];
params["number"] = 1;
params["boolean"] = true;
params["map"] = {"a":1,"b":"foo","c":false,"d":[]};
params.forEach((String key, dynamic value){
if(value is List){
params[key] = value.map((v)=>v.toString()).toList();
}else if(value is Map){
// ????
}else{
params[key] = value.toString();
}
//maybe have an additional one for custom classes, but if they are being passed around they should already have their own JSON Parsing implementations.
}
Ideally, the result of this would be passed into:
Uri myUri = new Uri(queryParameters: params);
and right now, while i solved the list issue, it doesn't like receiving maps. Part of me just wanted to stringify the map as a whole, but i wasn't not sure if there was a better way. I know that when someone accidentally stringified the array, it was not giving me: ?id=1&id=2 but instead ?id=%5B1%2C2%5D which was not correct.
I don't think there is any special support for maps. Query parameters itself is a map from string to string or string to list-of-strings.
Everything else need to be brought into this format first before you can pass it as query parameter.
A simple approach would be to JSON encode the map and pass the resulting string as a single query parameter.
I am using a google forms to collect responses which I will then use to score people. Unfortunately some of those responses only make sense in a non numeric form, here is an example:
Q: What is your most common mode of transportation?
Car
Carpool
Public transportation
Bike
Walk
I want to be able to have google sheets automatically convert those string responses into a number, as in Car will be 20, carpool 15 and so on so that I can "grade" them and give them a score. Can this be done through google forms? Or maybe some sort of dictionary function?
Thank you!
Another method, requiring no coding, would be to make a worksheet with the encoding of the options and then use VLOOKUP to translate them.
Yep, this can be done through Google Forms. Have a look at https://developers.google.com/apps-script/reference/forms/duration-item#setPoints(Integer)
Using their code, you could go something like
var formResponses = FormApp.getActiveForm().getResponses();
// Go through each form response
for (var i = 0; i < formResponses.length; i++) {
var response = formResponses[i];
var items = FormApp.getActiveForm().getItems();
// Assume it's the first item
var item = items[0];
var itemResponse = response.getGradableResponseForItem(item);
if (itemResponse != null && itemResponse.getResponse() == 'Car') {
var points = item.asMultipleChoiceItem().getPoints();
itemResponse.setScore(points * 20);
// This saves the grade, but does not submit to Forms yet.
response.withItemGrade(itemResponse);
}
}
// Grades are actually submitted to Forms here.
FormApp.getActiveForm().submitGrades(formResponses);