openlayers | packed library for creating interactive maps | Map library
kandi X-RAY | openlayers Summary
kandi X-RAY | openlayers Summary
OpenLayers is a high-performance, feature-packed library for creating interactive maps on the web. It can display map tiles, vector data and markers loaded from any source on any web page. OpenLayers has been developed to further the use of geographic information of all kinds. It is completely free, Open Source JavaScript, released under the BSD 2-Clause License.
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Top functions reviewed by kandi - BETA
- Creates a Style4 style .
- Extracts options from a configuration object .
- Render canvas .
- Parse a style attribute .
- Parse a literal style .
- Writes the feature object .
- Parse a tile matrix .
- Creates a new resolution constraints object .
- Draws a text on an outline .
- Parse node style style .
openlayers Key Features
openlayers Examples and Code Snippets
Lines of Code : 147License : Strong Copyleft (CC BY-SA 4.0)
Copy// defining a named function to generate the times, with given increments;
// the function is written with Arrow syntax, and passes in an Opts argument
// which defaults to an empty Object-literal if no argument(s) are passed by
// the useOption Explicit
Sub GetInboxItems_SingleDomain()
' Early binding - reference to Microsoft Outlook XX.X Object Library required
Dim ol As Outlook.Application
Dim ns As Outlook.Namespace
Dim fol As Outlook.Folder
Dim folItm As Object
Dim Option Explicit
Sub GetInbox_And_SentItems()
'Early binding - requires reference to Microsoft Outlook XX.X Object Library
Dim ol As Outlook.Application
Dim ns As Outlook.Namespace
Dim fol As Outlook.Folder
Dconst
btStartPause = document.querySelector('#container button:nth-of-type(1)')
, btStopClear = document.querySelector('#container button:nth-of-type(2)')
, btSnap = document.querySelector('#container button:nth-of-type(3)')
, snathis.currentVal = parseFloat(eval(this.calculation).toFixed(6));
const calculatorApp = {
data() {
return {
operationsTrack: [],
operations: [],
calculation: null,
currentVal: "",
const calculatorApp = {
data() {
return {
track: "",
currentVal: "",
previousVal: null,
operation: null,
isOperatorClicked: false,
isResultDisplayed: false,
busy: false
};
},
methods:SELECT
o.ProductID,
p.Description,
CustomerID = MAX(CASE WHEN o.rn = 1 THEN c.CustomerID END),
CustomerName = MAX(CASE WHEN o.rn = 1 THEN c.CustomerName END),
SUM(CASE WHEN o.rn = 1 THEN o.TotalQty END) AS QtyForTopCustomer
SUMselect ol.order_no, ol.line_no
from customer_order_line ol
where ol.order_no in (9891026, 9891025)
and not exists (
select * from customer_order_line x
where x.order_no = ol.order_no and x.line_no > 1
);
Option Explicit
Public ws As Worksheet
Public ol As ListObject
Public olRng As Range
Sub CopyTableToEmail()
Dim olCol As Integer, datCol As Integer
Set ws = Sheets("Test1")
Set ol = ws.ListObjects("tbClient")
Set olRng = .container{
position: relative;
margin: 20px;
font-family:"Lucida Console", Monaco, monospace;
font-size: 100%;
line-height: 120%;
}
.container .list {
position: absolute;
leCommunity Discussions
Trending Discussions on openlayers
QUESTION
I've working on a server that among other things will be hosting tile based map data. For this I'm using the mbtiles format. I'm able to host this successfully and it works if I use it as a regular VectorTileSource, but I'm unable to host it as a TileJSON source.
I'm using Vue's minimal client as a test base for development purposes. I've added the raw endpoint as one layer and my TileJson endpoint for the other layer. I've tried with both layers at the same time and with one at a time.
When I'm using the raw endpoint I get a map, and when I use the TileJSON I don't get anything. In both cases the raw endpoint is being called with the same parameters by the client (verified by network inspection), the data just isn't rendered.
Here's my very minimal client code:
...ANSWER
Answered 2022-Mar-30 at 20:46ol/source/TileJSON is a subclass of ol/source/TileImage and is only used for image tiles. Your TileJSON is intended for use in a Mapbox vector style definition - using ol/layer/MapboxVector you might be able to load tiles using the code below which will not style anything as it has no style "layers". But you can remove the empty style to use the OpenLayers default, or set your own style.
QUESTION
I have the following main.ts file in Vue3:
...ANSWER
Answered 2022-Mar-03 at 10:55To auto-install a Vue plugin in Nuxt 3, create a .js/.ts file under /plugins/ (create the directory if needed) with the following boilerplate:
QUESTION
In a web map application, I am trying to render a GeoTIFF file as an overlay layer on a OSM layer using OpenLayers 6. The layer is rendered on the exact location and it seems fine. Here is the screenshot of my results:
But if I zoom in, in some areas I could see smooth (simplified) edges which is not what I want:
Here is my code:
...ANSWER
Answered 2022-Feb-25 at 21:01interpolate is an option for the GeoTIFF constructor, not for individual sources
QUESTION
I'm new to Openlayers and have little experience with leaflet. A GeoJSON which worked in leaflet is at the completly wrong place (little red dot)
I can understand that it has something to do with projection, but as i'm new i could not find a working projection. As the GeoJSON worked perfectly in leaflet, i'm assuming its EPSG:3857 the file can be found here
ANSWER
Answered 2022-Feb-06 at 13:13The default projection of OpenLayers is EPSG:3857. Therefore you need to transform your GeoJSON feature of Germany, which is given in EPSG:4326. Try to fix format as follow setting featureProjection accordingly:
QUESTION
I'm using OpenLayers to draw a UK Ordnance Survey map. I have working examples, but they use a less secure method of accessing the UKOS servers by giving a key in the URL, whereas I'd like to use the more secure OAuth2 arrangement instead. To this end, I already have a CGI script querying the servers to get a session token, and returning this as JSON. The problem is making the map drawing page WAIT for its return, as follows:
...ANSWER
Answered 2022-Jan-30 at 13:35async functions always return promises. So code like { Authorization: "Bearer " + UKOS.getToken() } is going to be trying to concatenate a string with a promise, which is not what you want. You need to either call .then on the promise and put your code in the callback:
QUESTION
I have noticed that OpenLayers will not "load" source unless it is assigned to a layer which is assigned to map.
This code does console.log() with number of features in a KML layer:
ANSWER
Answered 2022-Jan-28 at 11:24You can combine features from multiple files and formats by fetching the urls and using the format's readFeatures() method
QUESTION
I am writing an application using osm in Openlayers. I'm having trouble adjusting the direction. I determine the direction of the device. Keeping the icon fixed and rotating the map shows the ridiculous places. However, using the device's orientation, it only shows the right place when you rotate the icon. It may be related to the first aspect of the icon, but I couldn't solve the problem. How can I solve this problem?
...ANSWER
Answered 2021-Dec-31 at 13:54I don't know why, but I multiplied the alpha by -1 and fixed the beta at 90 degrees. Problem solved.
QUESTION
I'm trying to replicate the "singleselect-hover" feature in this example from the OpenLayers site.
The issueWhen I tried to use this implementation, the hit detection was very poor with vtLayer.getFeatures(event.pixel). The documentation for the function states:
The hit detection algorithm used for this method is optimized for performance, but is less accurate than the one used in map.getFeaturesAtPixel()
Indeed, when I switched to map.getFeaturesAtPixel, the performance increased, but the features still does not work entirely as expected.
When I move my pointer over a vector boundary from the outside, it (usually) behaves as expected:
However, when I move to an adjacent boundary and then back, the feature no longer works:
My code: ...ANSWER
Answered 2021-Dec-23 at 19:53Adding an invisible Fill() to the unselectedStyle allowed the layer to be hit-detected and solved my issue!
QUESTION
I have geoserver (v2.18.1) serving up MapBox Vector tiles. It works nicely and the data is coming back and rendering on the client. I have the MBTiles plugin installed.
The issue I have is that the protobuf responses containing the date with each tile are very large in size. Some are over 2mb - even with GZip compression turned on. When rendering in OpenLayers the application starts to bog down - not to mention the bandwidth usage.
I've noticed that other online services are (i.e. https://api.maptiler.com) have tile sizes under 200kb. That's a massive difference.
Is there some way to configure Geoserver to filter the data returned to the client based on the zoom level? For example, exclude place names at low zoom levels. I've tried applying an MB Style document but that didn't seem to work.
Is it possible to do a server side filter on the Vector data before returning it to the client?
...ANSWER
Answered 2021-Nov-23 at 15:32Yes, the SLD file associated to your layer is the server-side filter. While the symbolizes are not used, the rules are driving what you see at the zoom levels.
QUESTION
I am trying to create a for loop that at each iteration updates the params of an OpenLayers map and once it is renderedcomplete it extracts the context of the mapcanvas and adds it to a GIF object. I need these to run synchronously as to always allow the map and layers to rendered and only then for the context to be added. My hacky solution at the moment is to use a fixed time setInterval, but as suggested in this question I should use async/await/Promises. My question is how would I go about wrapping my functions in a Promise and ensure they execute in a sequence while maintainning access to the context (this) of the vue app?
My for loop would look something like :
...ANSWER
Answered 2021-Nov-15 at 18:12Thanks to some help from Mr. Hocevar at OpenLayers (whom I suggest you support if you can on Github Sponsor) I got an answer for anyone interested.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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