The `/autocomplete` endpoint can promote nearby results to the top of the list, while still allowing important matches from farther away to be visible. For example, searching `hard rock cafe` with a focus on Berlin:
> /v1/autocomplete?api_key=search-XXXXXXX&focus.point.lat=52.5&focus.point.lon=13.3&text=hard rock cafe
> [/v1/autocomplete?api_key=search-hnopfLZ&__focus.point.lat=52.5&focus.point.lon=13.3&text=hard rock cafe__](https://search.mapzen.com/v1/autocomplete?api_key=search-hnopfLZ&focus.point.lat=52.5&focus.point.lon=13.3&text=hard rock cafe)
with `focus.point` you will find the Berlin restaurant first:
```
@ -52,7 +54,7 @@ without `focus.point` you will find the most popular restaurants first:
## Filters
You can filter the results in several ways: the original data source and/or the type of record.
You can filter the results in several ways: the original data source and/or the type of record.
### Sources
@ -63,7 +65,7 @@ The `sources` parameter allows you to specify from which data sources you'd like
To search for more than one `/place` in a request, join multiple values together and separate them with a comma. For example, this `/place` query looks up the Eiffel Tower in OpenStreetMap and the borough of Manhattan in Who's on First:
@ -14,7 +14,7 @@ With reverse geocoding with Mapzen Search, you can look up all sorts of informat
To get started with reverse geocoding, you need a [developer API key](https://mapzen.com/developers) and a latitude, longitude pair in decimal degrees specified with the parameters `point.lat` and `point.lon`, respectively. For example, the Eiffel Tower in Paris, France, is located at `48.858268,2.294471`. The reverse geocode query for this would be:
Notice that the first result is the Eiffel Tower (well, _Tour Eiffel_). The output is the standard GeoJSON format.
@ -36,7 +36,7 @@ Parameter | Type | Required | Default | Example
A basic parameter for filtering is `size`, which is used to limit the number of results returned. In the earlier request that returned the Eiffel Tower (or 'Tour Eiffel', to be exact), notice that other results were returned including "Bureau de Gustave Eiffel" (a museum) and "Le Jules Verne" (a restaurant). To limit a reverse geocode to only the first result, pass the `size` parameter:
The default value for `size` is `10` and the maximum value is `40`. Specifying a value greater than `40` will override to `40` and return a warning in the response metadata.
@ -51,7 +51,7 @@ By default, reverse geocoding returns results from any [data source](data-source
| [Who's on First](https://whosonfirst.mapzen.com) | `whosonfirst` | `wof` |
If you are performing a reverse geocode near a country boundary, and are only interested in results from one country and not the other, you can specify a country code. You can set the `boundary.country` parameter value to the alpha-2 or alpha-3 [ISO-3166 country code](https://en.wikipedia.org/wiki/ISO_3166-1). For example, the latitude,longitude pair `47.270521,9.530846` is on the boundary of Austria, Liechtenstein, and Switzerland. Without specifying a `boundary.country`, the first 10 results returned may come from all three countries. By including `boundary.country=LIE`, all 10 results will be from Liechtenstein. Here's the request in action:
@ -23,7 +23,7 @@ In the simplest search, you can provide only one parameter, the text you want to
For example, if you want to find a [YMCA](https://en.wikipedia.org/wiki/YMCA) facility, here's what you'd need to append to the base URL of the service, `search.mapzen.com`.
@ -38,7 +38,7 @@ If you are having trouble seeing the JSON in your browser, you can install a bro
In the example above, you will find the name of each matched locations in a property named `'label'`. The top 10 labels returned were:
> * YMCA, Bargoed Community, United Kingdom
* YMCA, Bargoed Community, United Kingdom
* YMCA, Nunspeet, Gelderland
* YMCA, Belleville, IL
* YMCA, Forest City, IA
@ -51,7 +51,7 @@ In the example above, you will find the name of each matched locations in a prop
Spelling matters, but not capitalization when performing a query with Mapzen Search. You can type `ymca`, `YMCA`, or even `yMcA`. See for yourself by comparing the results of the earlier search to the following:
Note that the results are spread out throughout the world because you have not given your current location or provided any other geographic context in which to search.
@ -65,12 +65,11 @@ By default, Mapzen Search results 10 places, unless otherwise specified. If you
@ -84,7 +83,7 @@ Sometimes your work might require that all the search results be from a particul
Now, you want to search for YMCA again, but this time only in Great Britain. To do this, you will need to know that the alpha-3 code for Great Britain is GBR and set the parameters like this:
@ -130,9 +129,9 @@ To specify the boundary using a rectangle, you need latitude, longitude coordina
For example, to find a YMCA within the state of Texas, you can set the `boundary.rect.*` parameter to values representing the bounding box around Texas: min_lon=-106.65 min_lat=25.84 max_lon=-93.51 max_lat=36.5
Tip: You can look up a bounding box for a known region with this [web tool](http://boundingbox.klokantech.com/).
Tip: You can look up a bounding box for a known region with this [web tool](http://boundingbox.klokantech.com/).
@ -143,7 +142,7 @@ For example, to find a YMCA within the state of Texas, you can set the `boundary
| `boundary.rect.max_lat` | 36.5 |
| `boundary.rect.max_lon` | -93.51 |
> * YMCA, Austin, TX
* YMCA, Austin, TX
* YMCA, Frisco, TX
* Y.M.C.A, Fort Worth, TX
* YMCA, Rockwall, TX
@ -162,7 +161,7 @@ Sometimes you don't have a rectangle to work with, but rather you have a point o
In this example, you want to find all YMCA locations within a 35-kilometer radius of a location in Ontario, Canada. This time, you can use the `boundary.circle.*` parameter group, where `boundary.circle.lat` and `boundary.circle.lon` is your location in Ontario and `boundary.circle.radius` is the acceptable distance from that location. Note that the `boundary.circle.radius` parameter is always specified in kilometers.
@ -209,7 +208,7 @@ To find YMCA again, but this time near a specific coordinate location (represent
Looking at the results, you can see that the few locations closer to this location show up at the top of the list, sorted by distance. You also still get back a significant amount of remote locations, for a well balanced mix. Because you provided a focus point, Mapzen Search can compute distance from that point for each resulting feature.
> * YMCA, Redfern, New South Wales [distance: 3.836]
* YMCA, Redfern, New South Wales [distance: 3.836]
* YMCA, St Ives (NSW), New South Wales [distance: 14.844]
* YMCA, Epping (NSW), New South Wales [distance: 16.583]
* YMCA, Revesby, New South Wales [distance: 21.335]
@ -227,7 +226,7 @@ Now that you have seen how to use boundary and focus to narrow and sort your res
Going back to the YMCA search you conducted with a focus around a point in Sydney, the results came back from distant parts of the world, as expected. But say you wanted to only see results from the country in which your focus point lies. You can combine that same focus point in Sydney with the country boundary of Australia like this.
@ -239,7 +238,7 @@ Going back to the YMCA search you conducted with a focus around a point in Sydne
The results below look different from the ones you saw before with only a focus point specified. These results are all from within Australia. You'll note the closest results show up at the top of the list, which is helped by the focus parameter.
> * YMCA, Redfern, New South Wales [distance: 3.836]
* YMCA, Redfern, New South Wales [distance: 3.836]
* YMCA, St Ives (NSW), New South Wales [distance: 14.844]
* YMCA, Epping (NSW), New South Wales [distance: 16.583]
* YMCA, Revesby, New South Wales [distance: 21.335]
@ -254,7 +253,7 @@ The results below look different from the ones you saw before with only a focus
If you are looking for the nearest YMCA locations, and are willing to travel no farther than 50 kilometers from your current location, you likely would want the results to be sorted by distance from current location to make your selection process easier. You can get this behavior by using `focus.point` in combination with `boundary.circle.*`. You can use the `focus.point.*` values as the `boundary.circle.lat` and `boundary.circle.lon`, and add the required `boundary.circle.radius` value in kilometers.
@ -268,7 +267,7 @@ If you are looking for the nearest YMCA locations, and are willing to travel no
Looking at these results, they are all less than 50 kilometers away from the focus point:
> * YMCA, Redfern, New South Wales [distance: 3.836]
* YMCA, Redfern, New South Wales [distance: 3.836]
* YMCA, St Ives (NSW), New South Wales [distance: 14.844]
* YMCA, Epping (NSW), New South Wales [distance: 16.583]
* YMCA, Revesby, New South Wales [distance: 21.335]
@ -296,7 +295,7 @@ The search examples so far have returned a mix of results from all the data sour
If you use the `sources` parameter, you can choose which of these data sources to include in your search. So if you're only interested in finding a YMCA in data from OpenAddresses, for example, you can build a query specifying that data source.
@ -306,7 +305,7 @@ If you use the `sources` parameter, you can choose which of these data sources t
Because OpenAddresses is, as the name suggests, only address data, here's what you can expect to find:
> * 0 Ymca, New Brunswick
* 0 Ymca, New Brunswick
* 0 Ymca Drive, Cary, NC
* 14843 Ymca Lane, Cormorant, MN
* 14660 Ymca Lane, Cormorant, MN
@ -319,7 +318,7 @@ Because OpenAddresses is, as the name suggests, only address data, here's what y
If you wanted to combine several data sources together, set `sources` to a comma separated list of desired source names. Note that the order of the comma separated values does not impact sorting order of the results; they are still sorted based on the linguistic match quality to `text` and distance from `focus`, if you specified one.
Julian Simioni
9 years ago
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GitHub