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Update README.md

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Josh Baker 2016-03-04 17:00:27 -07:00
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@ -116,7 +116,7 @@ You can choose a value between 1 and 8. The value 1 will result in no more than
<td>Sparse 5<img src="https://raw.githubusercontent.com/tidwall/tile38/master/doc/sparse-5.png" width="100" height="100" border="0" alt="Search Within"></td>
<td>Sparse 6<img src="https://raw.githubusercontent.com/tidwall/tile38/master/doc/sparse-6.png" width="100" height="100" border="0" alt="Search Within"></td>
</table>
*Please note that higher the sparse value, the slower the performance. Also, LIMIT and CURSOR are not available when using SPARSE.*
*Please note that the higher the sparse value, the slower the performance. Also, LIMIT and CURSOR are not available when using SPARSE.*
**WHERE** - This option allows for filtering out results based on [field](#fields) values. For example<br>```nearby fleet where speed 70 +inf point 33.462 -112.268 6000``` will return only the objects in the 'fleet' collection that are within the 6 km radius **and** have a field named `speed` that is greater than `70`. <br><br>Multiple WHEREs are concatenated as **and** clauses. ```WHERE speed 70 +inf WHERE age -inf 24``` would be interpreted as *speed is over 70 <b>and</b> age is less than 24.*<br><br>The default value for a field is always `0`. Thus if you do a WHERE on the field `speed` and an object does not have that field set, the server will pretend that the object does and that the value is Zero.
@ -132,7 +132,7 @@ You can choose a value between 1 and 8. The value 1 will result in no more than
## Geofencing
<img src="https://raw.githubusercontent.com/tidwall/tile38/master/doc/geofence.gif" width="200" height="200" border="0" alt="Geofence animation" align="left">
A [geofence](https://en.wikipedia.org/wiki/Geo-fence) is a virtual boundary that can detect when an object enters or exits the area. This boundary can be a radius, bounding box, or a polygon. Tile38 can turn any standard search into a geofence monitor by adding by the FENCE keyword to the search.
A [geofence](https://en.wikipedia.org/wiki/Geo-fence) is a virtual boundary that can detect when an object enters or exits the area. This boundary can be a radius, bounding box, or a polygon. Tile38 can turn any standard search into a geofence monitor by adding the FENCE keyword to the search.
<br clear="all">
A simple example: