Proj4js Example

Using Vector Layers 5. These catalogues describes spatial reference systems used by the API. See also the example HTML file under examples/namesearch. Use Proj4js for other transformations. Used by the GPS satellite navigation system and for NATO military geodetic surveying. OpenLayers 3 入门教程 摘要 OpenLayers 3 对 OpenLayers 网络地图库进行了根本的重新设计。版本 2 虽然被广泛使用, 但从 JavaScript 开发的早期发展阶段开始,已日益现实出它的落后。. GeoExt 2 — JavaScript Toolkit for Rich Web Mapping Applications GeoExt is Open Source and enables building desktop-like GIS applications through the web. interaction. uk is Campaign For Better Transport. Another problem with these overlays is that they are not clipped to the northern hemisphere. As an example, a parcel of land will have geospatial/polygon data that will need to go into the database, along with information about the Owners, the Owners Address/Contact info, the assess… ArcGIS Jobs Database Design Jobs Geographic Information System (GIS) Jobs PostgreSQL Programming Jobs QGIS Jobs Relational Databases Jobs. ’ ‘The evocation of a mythic landscape recalls elements of a child's tree house and the bower in Milton's Paradise Lost. This object has keys which correspond to a 'source' projection object. Google Maps http://maps. Proj4 Js Proj4 Js. Install Bower. Hi All, We are developing an app using ASP. Bootstrap 4 also requires a containing element to wrap site contents. This example demonstrates how a map's view can be adjusted so a geometry or coordinate is positioned at a specific pixel location. Attempting to implement Proj4js. Proj4js is a part of the MetaCRS group of projects and uses the same MIT style license as PROJ. reprojection, projection, proj4js, mapquest, wms Related API documentation:. 다른 표현을 사용해주시기 바랍니다. Regarding the proj4js module: I think it already does enough and was working just fine here. Proj4js conversion using Lambert 93 and the new proj4js API (v2. So I had to convert Lambert II into Longitude/Latitude. We use cookies for various purposes including analytics. Map Bubble with Latitude and Longitude (Requires the Proj4js library). Proj4js has breaking changes introduced after version 1. See also ndjson-cli for examples of manipulating GeoJSON using newline-delimited JSON streams. If your coordinates are in a different projection, you can add Proj4js to perform reprojections. getCode() value. JavaScript library to transform coordinates from one coordinate system to another, including datum transformations - proj4js/proj4js. js — Calvin Metcalf Another great talk, how the real estate website Hemnet switched its tile server to NodeJS. Compilation process has been refactored to fit Geoportal 3 infrastructure thus making further deliveries more simple. 0 버전까지 릴리즈 되었다. Preview location for any numerical coordinates on a detailed. 34) and a positive value for -180 longitude (20037508. If the proj4js library is not included, or if you wish to allow transforms between arbitrary coordinate reference systems, use the addTransform method to register a custom transform method. Phone Number. I was honored to receive a reply from company founder Petr Pridal himself, who suggested using an XYZ address as a possibility, together with a code sample. All you need to do is to define a projection object with proj4js and set to map's spatial reference. Single Image WMS. To start viewing messages, select the forum that you want to visit from the selection below. Originally a port of PROJ. The only reason I was getting invalid bounding boxes stemmed from using Proj4js, which for some reason gives a negative value for 180 longitude (-20037508. The keys should be strings, corresponding to the projection. Openlayers External Block Switcher provides Drupal's layerswitchers blocks per map, generated using the Form API. WGS84 Bounds: -180. oEarly example is the WinkelTripel—a modified azimuthal map projection, the arithmetic mean of the equirectangular projection and the Aitoffprojection oThe name Tripel(German for "triple") reflects Winkel'sgoal of minimizing distortion of area, direction and distance together. Discussion created by Sal I must be doing something wrong because the examples I've seen show that Proj4js works instead of a. The Java projection library is a partial port to Java of the popular PROJ. 9764, 671196. Followup: RE: MetaCRS Digest, Vol 28, Issue 6. Raster Reprojection. txt) or view presentation slides online. {"_id":"proj4","_rev":"100-62d85001d2f93aa71147ff5f4db7331e","name":"proj4","description":"Proj4js is a JavaScript library to transform point coordinates from one. If your coordinates are in a different projection, you can add Proj4js to perform reprojections. Z_INDEX_BASE {Object} ベースz-indexeです。 EVENT_TYPES {Array(String)} サポートされているイベントタイプです。特定のイベントにリスナーを登録する文法は下記に参照してください。. Second, the community and collaborative factor. Originally a port of PROJ. In this example, the run_script creates an instance (ldr) of a class named Loader that is defined in the same source file. Warped Swiss tiles example (warped-tiles-swiss. This example demonstrates how a map's view can be adjusted so a geometry or coordinate is positioned at a specific pixel location. Na vele verschillende pogingen met proj4js gedaan te hebben leek me het wijs om mensen die hier wat meer ervaring mee hebben om hulp te vragen. Overlay dynamically with layers information 8. How exactly should third party libraries be included in WAB through the lib/main? Question asked by PavelVeselsky on Apr 6, 2016 Latest reply on Apr 25, 2016 by FloCAD. Koordinatensystem / Coordinate system. For example you could use flood risk polygons, demographic data or other polygonal datasets you have kicking around to colour your hillshade with. 0兼容性,你仍然可以使用 Proj4Leaflet 版本 0. For example, the user picks Malden from the first dropdown, then the second dropdown's values narrow to include only schools in Malden. This package was started when proj4JS was a lot newer and less complete. AnyChart NodeJS module provides an easy way to generate SVG, JPG and PNG images of the charts on the server side. I try to create some kind of web map using Leaflet. A JavaScript library to transform point coordinates from one coordinate system to another, including datum transformations. A map is generated with three basic elements: markup, style declarations, and map initialization code. Project Management Content Management System (CMS) Task Management Project Portfolio Management Time Tracking PDF. tags: graticule, Mollweide, projection, proj4js. Testing the use cases for ol. Others are created by you, and in fact, most of your code will be written in the form of functions. LeafletはOpenStreetMapをベースに地図にアンカーなどを簡単に追加できるJavascriptライブラリです。店情報を地図に乗せたり、地域情報を表示したりするときに便利だと思います。 日本地図に. According to examples online and the Leaflet-ESRI API I don't think I've overlooked anything. Leaflet Tiles in Lambert 93 projection (2154) especially when you look at Bjorn Sandvik's working example! Download Leaflet, Proj4js and Proj4Leaflet, and fasten. The current version of Proj4Leaflet uses Proj4js 2. Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor. If the proj4js library is not included, or if you wish to allow transforms between arbitrary coordinate reference systems, use the addTransform method to register a custom transform method. About Maps in new OneMap. 12 restrictedExtent example fullscreen example: restrictedExtent for Image Layer. Here is a snippet how to select buildings from Finnish MTK/GML using XSL and convert it into SQL insert clause. But I couldn't find explicit example for using ol3 and proj4js. That allows me to, for example, familiarize myself with its features without having to use piracy, or, as a freelancer worker, develop my work based on my technical capacities rather than my financial ones. to(lon, lat) Takes a WGS84 longitude/latitude. Proj4js Coordinate transformations in the browser. Starting Points GitHub-- Contribute to Proj4js on Github Download-- Get Proj4js now! UserGuide-- User documentation - how to use Proj4js Examples?-- Examples of Proj4js in use MailingList-- Mailing lists and contact info. the OpenLayers. Drag and drop GPX, GeoJSON, IGC, KML, or TopoJSON files on to the map. 2014: OpenLayers 2. The matlab toolbox ConvertCoordinates can be used for coordinate transformations between a lot of coordinate systems. openlayer调用arcgis server发布的wms服务显示地图但是地图上下被压缩了 [问题点数:30分]. MassGIS WFS used in an example by Christian Spanring of Metropolitan Area Planning Council (MAPC) on how to reproject vectors in OpenLayers using Proj4js. Use of these haven't been tried recently so you may encounter problems. If it fails, it will eventually rely on spatialreference. Plugin que integra la librería Proj4js, lo que permite utilizar cualquier tipo de proyección en Leaflet. on Stack Overflow. jQuery, jQuery UI, and HammerJS. proj4js defs for the map projection The parameter "projstr" is used to work with definitions not covered by an EPSG-Code and sets Proj4js. js definition,. Proj4js has breaking changes introduced after version 1. Although boring logs, as shown in an example in Figure 8‐4, are typically included within PDF documents and reports archived in GeoDOG, the core data that underlies these boring logs arelost if not extracted and stored explicitly. 4 and GCTCP C it is a part of the MetaCRS group of projects. Examples might be simplified to improve reading and basic understanding. Example of a attributions visibily change on map resize, to collapse them on small maps. OpenLayers A high-performance, feature-packed library for all your mapping needs. 私のOpenlayersアプリでは、ベースマップの投影法がepsg900913または4326ではないので、位置情報機能を使用するためにproj4jsを含める必要があります。. Working with the TileVector source 5. If you want to use other projections, you will need to use, for example, the Proj4js library, which can do any transformation from one coordinate system to another. 现在Proj4js已经完善了很多-Proj4js use javascript rewrite the Proj4, and make the client and strengthen the function of the coordinate transformation. It then calls a method in the Loader class named load_shapefiles to do something useful—in this case, load all the shapefiles in a specified directory. getCode() value. We use cookies for various purposes including analytics. 升级到最新版openlayers5. html) Example of a single image WMS layer. OpenLSSearchCombo(config)¶ Create a ComboBox that provides a “search and zoom” function using OGC OpenLS XLS search. To start viewing messages, select the forum that you want to visit from the selection below. I tried to use Proj4Leaflet + Proj4js, but I don't understand how to figure the transformation matrix out. com/docs/images. Covering turf, proj4js, topojson, mbtiles. OpenLayers A high-performance, feature-packed library for all your mapping needs. Example of integrating Proj4js for coordinate transforms. NPM npm install proj-geojson. Draw to share new information on the Web 8. io/js/proj4leaflet. When this function is called it returns values that are far away or totally wrong from the actual boundaries of the projection, for example when zoomed in over a small city in the mid part of Sweden it returns the following extent:. Here's what a piece of GeoJSON looks like. It automatically fetches proj. This is a short example of using proj4gs, a port proj4js which is itself a port of the widely-used PROJ. Made by Miëtek Bak. What is your suggestion?. tags: wms, tile, tilelayer, proj4js, projection WMS without client projection example (wms-no-proj. defs[mapEPSG] = projstr. I'm writing back to you directly, rather than via the mailing. {"_id":"proj4","_rev":"100-62d85001d2f93aa71147ff5f4db7331e","name":"proj4","description":"Proj4js is a JavaScript library to transform point coordinates from one. from(x, y) Takes an OSGB36 grid reference, or northing/easting. Example of a WMTS source. 06°S and 85. 4와 CCTCPF를 JavaScript로 포팅한 프로젝트 로 MetaCRS 그룹의 오픈소스 프로젝트이며 MIT License 를 따른다. Single Image WMS (wms-image. If you for some reason need Proj4js version 1. Hi Angel, As I'm sure you're aware, we do not advice integrating a different version of JET in your APEX install, due to the shared dependencies both APEX and JET have on 3rd party libraries i. code_type = "EPSG". Here's what a piece of GeoJSON looks like. A few comments: - Probably needs some more documentation. Proj4Net is a C#/. The current version of Proj4Leaflet uses Proj4js 2. Using custom projection without Proj4js 7. Covering turf, proj4js, topojson, mbtiles. Let's see how to set that up within an Oracle JET module, rather than via the require block, which is how it is defined in the Oracle JET Cookbook. For example, you can't keep step with the evolution of the mapping libraries, as the toolkits can't develop so rapidly. interaction. This example shows client-side raster reprojection between various projections. Creating a simple OpenLayers Map¶. Then, I turned to DotSpatial. Published under the MIT X11 license. js from the latest release's dist/ folder. PROJ4JS - 소개 Proj4js는 C언어 기반의 PROJ. Benefit from world-wide map data for web or desktop applications. npm install proj4. Proj4js is a part of the MetaCRS group of projects and uses the same MIT style license as PROJ. Skip to content. For example: Map layer value of "1. See Command-Line Cartography for a longer introduction. 0 compatibility, you can still use Proj4Leaflet version 0. Luckily, there is a Proj4Leaflet plugin you could use too. This example shows client-side raster reprojection between various projections. Section Examples list. 34), which is the reverse of what one would expect--this led to the invalid bounding box (min x of 20037508. Applying Zoomify sample knowledge to a single raw image 5. If the proj4js library is included, the transform method will work between any two coordinate reference systems with proj4js definitions. Proj4js has breaking changes introduced after version 1. Due to web browser security restrictions, these files must be from the same domain as the host webpage. Starting Points GitHub-- Contribute to Proj4js on Github Download-- Get Proj4js now! UserGuide-- User documentation - how to use Proj4js Examples?-- Examples of Proj4js in use MailingList-- Mailing lists and contact info. AnyChart NodeJS module provides an easy way to generate SVG, JPG and PNG images of the charts on the server side. Utiliser Proj4js pour d'autres transformations. openlayer调用arcgis server发布的wms服务显示地图但是地图上下被压缩了 [问题点数:30分]. I'm using the proj4s javascript library (based on advice from this question I asked previously) to convert lat/long values on my webpage. A map is generated with three basic elements: markup, style declarations, and map initialization code. Proj4js has breaking changes introduced after version 1. If you want to download the full source code, including unit tests, files for debugging, build scripts, etc. Map Bubble with Latitude and Longitude (Requires the Proj4js library). proj is a structure defining the map projection. 现在Proj4js已经完善了很多-Proj4js use javascript rewrite the Proj4, and make the client and strengthen the function of the coordinate transformation. Relative to WGS 84 / World Mercator (CRS code 3395) errors of 0. If it fails, it will eventually rely on spatialreference. In this example, the run_script creates an instance (ldr) of a class named Loader that is defined in the same source file. The SVN repository for Proj4js is at: metacrs/proj4js Some example Proj4js definition files can be found in the proj4js/lib/defs subdirectory however this project does not intend to become a repository of coordinate system definitions. Z_INDEX_BASE {Object} ベースz-indexeです。 EVENT_TYPES {Array(String)} サポートされているイベントタイプです。特定のイベントにリスナーを登録する文法は下記に参照してください。. I've got a pretty simple projection up here which should allow us to test the answer proposed by @ilia and figure out something which we can all get to work. Gaia3D 기술세미나 2013. By default, django-leaflet will try to load the spatial reference from your static files at “proj4js/{{ srid }}. In this case we are listening to the change-geometry event and projecting the latitude and longitude coordinates to EPSG:2193, New Zealand Transverse Mercator (NZTM). 4 C library. Applying Zoomify sample knowledge to a single raw image 5. Originally a port of PROJ. 34) and a positive value for -180 longitude (20037508. Map('map_element', {});. x has been added to OpenLayers 3 master. If the proj4js library is not included, or if you wish to allow transforms between arbitrary coordinate reference systems, use the addTransform method to register a custom transform method. For additional information about the Oracle JET Starter Templates, see Create a Web Application Using the Oracle JET Starter Templates. The example below is using Proj4js library. json에 저장하기 2016. With transparent Proj4js integration, OpenLayers can transform coordinates between arbitrary projections. The initial-scale=1 part sets the initial zoom level when the page is first loaded by the browser. Containers. Here's what a piece of GeoJSON looks like. 3 : a shelter (as in a garden) made with tree boughs or vines twined together : arbor. 16 D3 geo projection; 2. I searched a little more and found node-proj4js a NodeJs port of Proj4Js. 9996012717 +x_0=400000 +y_0=-100000 +ellps=airy +datum=OSGB36 +units=m +no_defs";. How to use it with GeoJSON. openlayer调用arcgis server发布的wms服务显示地图但是地图上下被压缩了 [问题点数:30分]. Foreign projections have to be registered to proj4js first (epsg. Note: This functionality is for advanced users and may not be supported across all functions (for example, addRasterImage currently works only with EPSG:3857 Web Mercator). the OpenLayers. Working with the TileVector source 5. 55667500000000000 lng = 31. For example, the user picks Malden from the first dropdown, then the second dropdown's values narrow to include only schools in Malden. {"_id":"proj4","_rev":"100-62d85001d2f93aa71147ff5f4db7331e","name":"proj4","description":"Proj4js is a JavaScript library to transform point coordinates from one. This is a short example of using proj4gs, a port proj4js which is itself a port of the widely-used PROJ. 4 uses and these values must be defined before the constructor is called. From the command line, run:. The current version of Proj4Leaflet uses Proj4js 2. html)」を参考に地図を表示してみます。 ここでは、Proj4js を使用するので、設定します。 「23 - OpenLayers で地図を重ねる 3 - 数値標高モデルの画像の地図を重ねる2」を参考にします。. This page was made with QGIS and Qgis2threejs plugin, and uses the following library: three. MandatoryFeatureFields • Central Asset Id Confirm Mapping. HTML preprocessors can make writing HTML more powerful or convenient. If you for some reason need Proj4js version 1. The current version of Proj4Leaflet uses Proj4js 1. If the proj4js library is not included, or if you wish to allow transforms between arbitrary coordinate reference systems, use the addTransform method to register a custom transform method. Here is a simple example how to switch between WGS84, Web Mercator and Finnish ETRS-TM35FIN. This example shows client-side raster reprojection capabilities of OpenLayers 3 between various projections. All those Coordinate Reference Systems (CRS) are supported by the Apache SIS™ library version 1. Here is an example. Map class Notice how we use the new keyword, then specify the class name OpenLayers. Covering turf, proj4js, topojson, mbtiles. Leaflet Tiles in Lambert 93 projection (2154) especially when you look at Bjorn Sandvik's working example! Download Leaflet, Proj4js and Proj4Leaflet, and fasten. Estos datos los podemos encontrar el la página web de spatialreference. 14 or later. Originally a port of PROJ. #108 Add examples to docs on adding overlays, customising maps in templates, admin and forms Fix typo in default proj4js path (ref #71) Django Leaflet forms. 5metres" or "1. Map('map_element', {});. Data event expression examples. Site title of www. Coordinate Transformation using Proj4js. I'm using the proj4s javascript library (based on advice from this question I asked previously) to convert lat/long values on my webpage. Add the relevant Proj4js files After adding the new CRS, download the relevant Proj4js file for the EPSG code from www. Example of integrating Proj4js for coordinate transforms. The example below is using Proj4js library. This is convenient for small architects working on only a few projects a year. This example demonstrates how a map's view can be adjusted so a geometry or coordinate is positioned at a specific pixel location. We use cookies for various purposes including analytics. js which includes all files required (or lib/proj4js-combined. sql, you can use to create a table called plaques in a MySQL database and import the same data that we have seen already. 系番号 座標系原点の経緯度 適用区域; i : 129度30分0秒0000: 33度0分0秒0000: 長崎県 鹿児島県のうち北方北緯32度南方北緯27度西方東経128度18分東方東経130度を境界線とする区域内(奄美群島は東経130度13分までを含む。. js, ref Territorial Turf blog. 15 CanvasTileLayer: an example Display a map. Map Bubble with Latitude and Longitude (Requires the Proj4js library). x use the 0. I attached an example using twitter data-sets. Because the check for presence of the Proj4js library and the definition only takes place on the first request for them, this means they can be loaded dynamically as needed; for example, with user-supplied data where you don't know in advance what projections are needed, you can initially load minimal support and then load whichever are requested. To add any other area (for example France) fill the fields as below and click Add. 07; Proj4를 활용한 Converting 작업 (X/Y 좌표 → 위도/경도) 2016. To integrate it, you will have to include them into your website copying the following lines in the HEAD tags of your website. The Projection used within the map file is "EPSG:25832", both map and layers uses this projection. If the proj4js library is included, the transform method will work between any two coordinate reference systems with proj4js definitions. Draw to share new information on the Web 8. Add the relevant Proj4js files After adding the new CRS, download the relevant Proj4js file for the EPSG code from www. For example, the zoom level could be chosen such that all direct neighbors of the netbox in Netmap’s graph are visible. 23 npm install 시 package. EPSG:3857. Since you need to provide the same information within the Javascript library proj4js. In the case of Leaflet, there is a Proj4Leaflet plugin. 3657, 1230275. Modify to update drawing 8. To post to this group, send email to geoe[email protected] This parser implementation is based on the ESRI Shapefile Technical Description , dBASE Table for ESRI Shapefile (DBF) and Data File Header Structure for the dBASE Version 7 Table File. Creating a loader function 5. 在 SegmentFault,学习技能、解决问题. Based on the Proj4Leaflet example Thanks to @perliedman and @bartvde for their help with the original and the post Leaflet v0. If you for some reason need Proj4js version 1. Preview location for any numerical coordinates on a detailed. Second, the community and collaborative factor. 09/10/2013 Map API Documentation 2. Using GeoJSON with Leaflet - Leaflet - a JavaScript library for interactive maps. This object has keys which correspond to a 'source' projection object. WMS without Projection (wms-no-proj. js would be sufficient. txt) or view presentation slides online. Proj4Leaflet. The current version of Proj4Leaflet uses Proj4js 1. WGS84 Bounds: -180. More options with ol. WebJars are client-side web libraries (e. Using the cluster source 5. 건전한 인터넷 문화 조성을 위해 회원님의 적극적인 협조를 부탁드립니다. Proj4js is a JavaScript library to transform point coordinates from one coordinate system to another, including datum transformations. Attempting to implement Proj4js. Compilation process has been refactored to fit Geoportal 3 infrastructure thus making further deliveries more simple. Benefit from world-wide map data for web or desktop applications. js http://threejs. Creating a simple OpenLayers Map¶. OpenLSSearchCombo(config)¶ Create a ComboBox that provides a “search and zoom” function using OGC OpenLS XLS search. 9764, 671196. Current View URL. First, as we will need the PROJ4JS library for this example, we include it in the HTML file:. example [ lat , lon ] = projinv( proj , x , y ) returns the latitude and longitude values from the inverse projection transformation. Others are created by you, and in fact, most of your code will be written in the form of functions. OK, I Understand. Using custom projection with WMS sources 7. In that example, the selection is defined with the expression Count >3 which has a logical value (TRUE or FALSE) for each row of the attribute table Cholera_deaths. Moved proj4js and geo-openlayers to plone resources directory [gborelli] Removed skin layer, use plone resources instead [gborelli] Fixed tests and doctests for plone5 and external api modifications [pbauer] Modified openlayer css to fix collectivegeo-controlpanel issues [pbauer] Fixed typo in resources registration [pbauer]. Utiliser Proj4js pour d'autres transformations. Single Image WMS with Proj4js (wms-image-custom-proj. Koordinatensystem / Coordinate system. 07; Proj4를 활용한 Converting 작업 (X/Y 좌표 → 위도/경도) 2016. 0) and supported by proj4js. If the proj4js library is not included, or if you wish to allow transforms between arbitrary coordinate reference systems, use the addTransform method to register a custom transform method. JavaScript library to transform coordinates from one coordinate system to another, including datum transformations - proj4js/proj4js. If Netmap's GraphML data document is extended to include geographical coordinates, both of these strategies can be implemented in the Netmap client by computing a bounding box and using it as the bbox argument to Geomap. defined in the PROJ4 epsg file (version 4. Creating a loader function 5. maptalks能和proj4js一同工作, 载入不同空间参考系的地图数据. ’ ‘The evocation of a mythic landscape recalls elements of a child's tree house and the bower in Milton's Paradise Lost. 在 SegmentFault,学习技能、解决问题. spatialreference. Thanks to the awesome community behind Leaflet, there are literally hundreds of nice plugins to choose from. Producing a raster backdrop in this way can offer some nice rendering performance gains and help you to simplify your projects. OpenLayers 3 入门教程 摘要 OpenLayers 3 对 OpenLayers 网络地图库进行了根本的重新设计。版本 2 虽然被广泛使用, 但从 JavaScript 开发的早期发展阶段开始,已日益现实出它的落后。. html)」を参考に地図を表示してみます。 ここでは、Proj4js を使用するので、設定します。. GeoMOOSE 2 uses the Proj4js library to perform all of its projection work. NPM npm install proj-geojson. Over the last few days we explored the official FIFA data on each participating team. The easiest way to use a custom projection is to add the Proj4js library to your project and then define the projection using a proj4 definition string. Since you need to provide the same information within the Javascript library proj4js. Example of integrating Proj4js for coordinate transforms. I am however not familiar with providing libraries in Drupal so I can't really judge if doing less would be better. The previous example was very simplistic because OpenLayer's default projection (unprojected lat/lons) and scale configuration were used For custom raster layers, the layer should be configured with its extents, resolutions or scales, and projection The resolution configuration can be done in several ways, in this. Introduction. htmlを実行すると下記のようにブラウザで表示されます。 ※「この地図は、国土地理院長の承認を得て、同院発行の電子地形図(タイル)を複製したものである。. Proj4js conversion using Lambert 93 and the new proj4js API (v2. The keys should be strings, corresponding to the projection. Returns an OSGB36 grid reference, or northing/easting. About HTML Preprocessors. Try the following steps: Open up the previous.