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Saturday, 4 July 2020

Updating of OpenWebGIS July 2020


OpenWebGIS continues its development. Now it is available at the new link. Some time ago the system version called OpenWebGIS version 2 was updated. Work on this version was started several years ago. 3D mode for viewing map information on Earth globe was added. Some other functions were also added, for example import/export of CSV files, some minor bugs were fixed in other functions. Though at the moment because of some different reasons there isn`t fast and sufficient development of OpenWebGIS, but the system goes on existing and though slowly but still it improves.
OpenWebGIS is based on open source JavaScript libraries OpenLayers3, Cesium an open-source JavaScript library for world-class 3D globes and maps and OL-Cesium for OpenLayers - Cesium integration. The code has been updated on GitHub. So you can use a new open source code of OpenWebGIS 2. Implementation of newer version of OpenLayers in the code of OpenWebGIS is planned to be done in the future.
The system version called OpenWebGIS version 1 ( based on OpenLyers 2) is also developing, some issues have been fixed in the prediction function as well as the Czech interface has been added, thanks for Jiri Podhorecky.
OpenWebGIS 1 (main version) has more vast set of functions than OpenWebGIS 2 but perhaps it is not comfortable enough for using on modern mobile devices and its interface is really intense that is exessive for some users.

Friday, 3 July 2020

New links (URL) for OpenWebGIS


Now OpenWebGIS is available only at the new link http://opengis.ddns.net/gis/opengis_eng.html  or at the http://opengis.ddns.net, http://openwebgis.ddns.net for interface selecting in several languages. Old link for OpenWebGIS: http://opengis.dlinkddns.com doesn't work and it will never work. OpenWebGIS with a new version  of interface is available at the link  http://opengis.ddns.net/gis/openwebgis2/opengis_en.html, but this version has less set of functions and scope than the main version of OpenWebGIS.

Tuesday, 20 December 2016

New in OpenWebGIS 2, December 2016

OpenWebGIS version 2 is an open source web-browser based Geographic information system (GIS). OpenWebGIS 2 continues to develop. As has been announced now the second version of OpenWebGIS is created based on OpenLayers 3 (OL3). Version 1 of OpenWebGIS (old interface system, new interface system) uses OpenLayer 2 (OL2). Thus the code base of OL2 and OL3 is totally different (new event handlers, etc). so migration pretty much means full rewriting of source code, so the work moves slowly. The main purpose of OpenWebGIS 2 is the transformation of this GIS on the modern software basis for modern browsers and mobile devices with touch screens, to increase speed, fix issues of the previous version and create new opportunities for users. At this stage OpenWebGIS 2 is an editor for adding, styling and exporting of vector layers in various formats. The main menu in the expanded view is shown in Figure 1.
Figure 1 - The main menu of OpenWebGIS 2
There is a geolocation feature through which you can get your positions in the form of a set of points, there are problems with the tracks drawing that will be solved soon. Also there may be some possible problems with getting geolocations in the latest versions of browsers (Geolocation API Removed from Unsecured Origins in Chrome 50).
The source code of OpenWebGIS 2 you can get on GitHub. Source code of version 1 OpenWebGIS you can get on GitHub and also version for Android (source code for Android and APK file for Android OS).
You can find detailed information about OpenWebGIS features and applications on our blog and at the opensource.com.
The OpenWebGIS blog and a full list of articles about OpenWebGIS provide a lot of information about possibilities and specific features of OpenWebGIS.

Tuesday, 15 November 2016

OpenWebGIS is working again


OpenWebGIS is running again after moving and a long period of non-working and you can use this free and open, browser based geographic information system (GIS) at the usual link.
Besides earlier announced plans on system developing (read about it also at Digital-geography.com and Geoawesomeness.com) OpenWebGIS team sets the new goal to explore the possibility to use the new library version of OpenLayers 3 (now in the core of the system OpenLayers 2 is used). The result of the first experiments is available at the link ( it will be updated, please follow the changes). This experimental version we will call OpenWebGIS 2. While the version OpenWebGIS 1.0 still is the main, actual and constantly supported. This OpenWebGIS 1.0 version should be used for your  diverse tasks in cartography.
Last month OpenWebGIS was working in the test mode, now it is fully functioning, but there are still some small technical problems - sometimes the system can be online unavailable.  In this case you should wait for a while and everything will be alright. You can use source code OpenWebGIS for your  projects. Copy and use it, it is possible to use the OpenWebGIS without having to connect to the server of OpenWebGIS and even without Internet connection. For doing this just download OpenWebGIS source code from GitHub or version for Android (source code for Android and APK file for Android OS). OpenWebGIS has new version of the interface. It is activated when you click on the «New Interface» button.
The OpenWebGIS team sincerely thanks everyone who uses our system, supports us, helps with their advice, and publishes information about OpenWebGIS. We hope to continue cooperation.
You can find detailed information about OpenWebGIS features and applications on our blog and at the opensource.com.
The OpenWebGIS blog and a full list of articles about OpenWebGIS provide a lot of information about possibilities and specific features of OpenWebGIS.

Thursday, 4 August 2016

Attention to all users of geographical information system OpenWebGIS



The OpenWebGIS server is physically moving to another location.
Besides the system will perhaps get another domain name and (or) it will use the web hosting service. Or for the users perhaps everything will remain as it was before.
But in any case for some time OpenWebGIS at the link http://opengis.dlinkddns.com will be unavailable.
It is not known how much time it will take to solve all these questions. It will be announced later.
But you can always (any time) and without limitations use OpenWebGIS local version, which is available for downloading from GitHub https://github.com/openwebgisystem/OpenWebGIS.
We apologize for any inconvenience caused to our users. 
The OpenWebGIS team sincerely thanks everyone who uses our system, supports us, helps with their advice, and publishes information about OpenWebGIS. We hope to continue cooperation.
You can find detailed information about OpenWebGIS features and applications on our blog (http://openwebgisystem.blogspot.com) and at the opensource.com (https://opensource.com/life/16/3/openwebgis)

Sunday, 24 July 2016

Import/Export of map layers from CSV file with WKT geometry in OpenWebGIS and QGIS


Almost in every Geographic information system (GIS) there is an opportunity to create maps (vector map layers) from files in CSV format. So CSV (Comma-separated values) file stores tabular data, that looks like numbers and text, in plain text. Each line of the file is a data record. Each record consists of one or more fields, separated by commas. In addition, the term "CSV" also denotes some closely related delimiter-separated formats that use different field delimiters. It is easy to add the data from such a file on a map, when it contains the information only about points and their attributes. In this case one field contains the longitude of the point, and in another field there is the latitude of the point.
For example the file with the information about the major world cities looks like this:

longitude,latitude,NAME,COUNTRY,POPULATION,CAPITAL
33.08604049999976,68.96354674999974,Murmansk,Russia,468000,N
40.646160130000375,64.52066803000004,Arkhangelsk,Russia,416000,N
30.453327180000375,59.95188904000009,Saint Petersburg,Russia,5825000,N
150.78001403999605,59.57099915000014,Magadan,Russia,152000,N
120.23000336000206,23.170000080000083,Tai-nan,Taiwan,656927,N
60.610130310000386,56.84654235999987,Yekaterinburg,Russia,1620000,N
43.9406700100003,56.28967667000006,Nizhniy Novgorod,Russia,2025000,N
-4.269947530000034,55.86280822999996,Glasgow,UK,1800000,N
120.23000336000206,23.170000080000083,Tai-nan,Taiwan,656927,N
61.39261246000016,55.14500045999982,Chelyabinsk,Russia,1325000,N
73.25028992000036,55.063304900000205,Omsk,Russia,1175000,N
82.94284821000016,55.03210067999992,Novosibirsk,Russia,1600000,N
56.09612655999974,54.82173537999994,Ufa,Russia,1100000,N
25.275966640000274,54.688568120000184,Vilnius,Lithuania,582000,Y
….
So according to the rules of every particular GIS, it is necessary to specify which fields are the fields with coordinates, then press "OK" button and here we get the map. We will tell how to do it with the help of QGIS and OpenWebGIS - Free and Open Source Geographic Information Systems.
In OpenWebGIS it is done as shown in Figure 1 and 2. To do it - you can select menu item "Layer->New point Layer from csv file". First it is necessary to select CSV file with the help of "Browse" button, then fields with longitude and latitude.
Figure 1 - Adding CSV file on the OpenWebGIS map

Sunday, 3 July 2016

One of the methods to create and use offline base maps for web based GIS, JavaScript example



In order to create a base map for web based and browser Geographic information system (GIS), which can be used in offline mode (i.e., when there is no Internet connectivity), the following methods may be used: