Qgis plugins

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FLO-2D Plugin – QGIS

Visit spatialthoughts. Plugins are a great way to extend the functionality of QGIS. You can write plugins using Python that can range from adding a simple button to sohpisticated toolkits. This tutorial will outline the process involved in setting up your development environment, designing the user interface for a plugin and writing code to interact with QGIS. We will develop a simple plugin called Save Attributes that will allow users to pick a vector layer and write its attributes to a CSV file.

Qt is a software development framework that is used to develop applications that run on Windows, Mac, Linux as well as various mobile operating systems. QGIS itself is written using the Qt framework. For plugin development, we will use an application called Qt Creator to design the interface for our plugin.

Download and install the Qt Creator software from SourgeForge. Since we are developing the plugin in Python, we need to install the python bindings for Qt. The method for installing these will depend on the platform you are using.

For building plugins we need the pyrcc4 command-line tool. Install the package QGIS. Install the Homebrew package manager. Install PyQt package by running the following command:. Depending on your distribution, find and install the python-qt4 package.

Top 5 QGIS Plugins

On Ubuntu and Debian-based distributions, you can run the following command:. Any kind of software development requires a good text editor.

qgis plugins

If you already have a favorite text editor or an IDE Integrated Development Environmentyou may use it for this tutorial. Otherwise, each platform offers a wide variety of free or paid options for text editors. Choose the one that fits your needs. Python is very sensitive about whitespace and this setting will ensure tabs and spaces are treated properly.

There is a helpful QGIS plugin named Plugin Builder which creates all the necessary files and the boilerplate code for a plugin. Find and install the Plugin Builder plugin.QGIS has been designed with a plugin architecture. Many of the features in QGIS are actually implemented as either core or external plugins. Managing plugins in general means loading or unloading them using the Plugin Manager. External plugins can be installed and directly activated or uninstalled using the Python Plugin Installer.

To deactivate and reactivate external plugins, the Plugin Manager is used again. Plugin Manager. The Plugin Manager lists all the available plugins and their status loaded or unloadedincluding all core plugins and all external plugins that have been installed and automatically activated using the Python Plugin Installer see Section Loading an external QGIS Plugin.

Those plugins that are already loaded have a check mark to the left of their name. To enable a particular plugin, click on the checkbox to the left of the plugin name, and click [OK].

When you exit the application, a list of loaded plugins is retained, and the next time you run QGIS these plugins are automatically loaded. If you find that QGIS crashes on startup, a plugin may be at fault. You can stop all plugins from loading by editing your stored settings file see Options for location. Locate the plugins settings and change all the plugin values to false to prevent them from loading. Do this for each plugin in the [Plugins] section.

You can then start QGIS and add the plugins one at a time from the Plugin Manager to determine which plugin is causing the problem. For other external repositories, they might be available with the external plugins themselves. In general it is not included in this manual. Updates of core python plugins may be available in this repository as external overlays.

Some of these plugins offer functionality that will be required by many users for example: providing the user with the ability to view and edit OpenStreetMap data, or to add GoogleMap layers while others offer very specialized functions for example: Calculate economic pipe diameters for water supply networks.

If you do not want one or more of the added repositories, they can be disabled via the [Edit Installing external python plugins.

To install a plugin, select it from the list and click the [Install plugin] button.Besides the source code developers also message translators, people who write documentation, those who report bugs and wishes and more are involved.

Why so late?

Because the World Wide Web WWW became available in the s along with tools like browsers and such, followed by the development of distributed source code management tools. See here for historic details on our various bug trackers. Git comes with numerous advantages, yet we needed to decide which hosting platform to use. Options where github.

qgis plugins

Through a survey we found out that the preference among contributors is GitHub. If all fails say, one day GitHub no longer being a reasonable choice the import of our project from GitHub to GitLab is always possible.

A series of links had to be updated. Martin Landa invested days and days on that thanks!! As the date for the trac migration we selected r as it was the first SVN commit after the years in CVS.

The migration of trac bugs to github i. The following circumstances could be identified:. We came up with several lookup tables, aiming at catching all variants. Note that the complete issue migration is still to be done as of Nov.

In order to avoid users being flooded by emails due to the parsing of user contributions which normally triggers an email from github we reached out to GitHub support in order to temporarily disable these notifications until all source code and selected issues were migrated. The issue conversion rate was 4 min per trac bug to be converted and uploaded to github. Fairly slow but likely due to the API rate limit imposed and the fact that the migration script above generates a lot of API requests rather than combined ones.

Note to future projects to be migrated: use the new gihub import API unfortunately we got to know about its existence too late in our migration process. In order to guide the user when reporting new issues, we will develop a small template — forthcoming. We changed the settings from SVN post-hook to Github commit notifications and they flow in smoothly into the grass-commit mailing list. Join it to follow the development. Usually this happens because what I think will be a trivial change snowballs into something much more sweeping.

I thought I would record here how to deal with situations like this I often do this - I work away on my master branch and suddenly realise 'damn I should have branched before I started this'.QGIS is ontworpen met een architectuur voor plug-ins. Dit maakt het toevoegen van nieuwe functionaliteit en functies aan de toepassing eenvoudiger. Most of External Plugins are currently written in Python.

Detailed documentation about the usage, minimum QGIS version, home page, authors,and other important information are provided for the plugins in the Official repository. For other external repositories, documentation might be available with the external plugins themselves.

External plugins documentation is not included in this manual. On some platforms e. According to the plugin manager settingsQGIS main interface can display a blue link in the status bar to inform you that there are updates for your installed plugins or new plugins available. The menus in the Plugins dialog allow the user to install, uninstall and upgrade plugins in different ways.

Each plugin has some metadata displayed in the right panel:. At the top of the dialog, a Search function helps you find any plugin using metadata information author, name, description It is available in nearly every menu except Settings. In the All tab, all the available plugins are listed, including both core and external plugins. Use [Upgrade all] to look for new versions of the plugins. Furthermore, you can use [Install plugin] if a plugin is listed but not installed, [Uninstall plugin] as well as [Reinstall plugin] if a plugin is installed.

De tab Alles. In Installed tab, you can find only the installed plugins.

Introduction to QGIS

The external plugins can be uninstalled and reinstalled using the [Uninstall plugin] and [Reinstall plugin] buttons. You can [Upgrade all] here as well. The Not installed tab lists all plugins available that are not installed. The Upgradeable and New tabs are enabled when new plugins are added to the repository or a new version of an installed plugin is released.

If you activated Show also experimental plugins in the Settings menu, those also appear in the list giving you opportunity to early test upcoming tools. Installation can be done with the [Install plugin][Upgrade plugin] or [Upgrade all] buttons. The Upgradeable tab. The Invalid tab lists all installed plugins that are currently broken for any reason missing dependency, errors while loading, incompatible functions with QGIS version You can try the [Reinstall plugin] button to fix an invalidated plugin but most of the times the fix will be elsewhere install some libraries, look for another compatible plugin or help to upgrade the broken one.

De tab Ongeldig. In the Settings tab, you can use the following options:.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

It only takes a minute to sign up. Atlas - Only been available for a couple of weeks but use it all the time since.

Allows you to create map books easily. Saved me a lot of time on a project with a pipeline split into 20 maps - all I had to do was provide the plugin with a layer of polygons for the locations of each map and a composer and it automatically turns each composer into an image file.

Numerical Digitise - Allows you to provide coordinates to create features. Very useful for creating a point at an exact coordinate quickly when someone gives me a site location rather than trying to click in the right location on the map. Time manager - Allows you to view data which has a time element to it. We use it to visualise ecological data over the course of a survey - looking to see if there are any parts of a study site that have more data at certain times of the survey period and where and when the most data occurs.

Import project - Allows you to load in layers from another project - you can choose which ones you would like to load. I find it very useful to set up a project with all of my base layers loaded and styled like Ordnance Survey mapping, site boundaries, buffers etcand then import these using this plugin when I am ready to incorporate them with other data. Very useful for exporting data for reports. Photo2Shape - extracts georeferencing information from geotagged images.

It allows us to visualise where photos were taken on a project site so people can remember where they were when they took the photo. Table manager - allows you to manage a tables structure rename, insert and delete columns etc.

Shapefile splitter - can split a shapefile into separate files by the values in a column. We use this when we need to provide people with shapefiles that only contain one feature type. Now it is called processing. OpenLayers If you are working with wgs84 system.

qgis plugins

This can give you a basemap. This makes it easier to perform operations and visualize results. Apart from the easy-to-add background of Openstreetmap or Google satellite just to check if a layer with an exotic CRS is well-placed, I have managed to cut some geotiffs with official maps into tiles, and have them delivered by an apache localhost. This needs some tweaking in the openlayers plugin code unfortunately after every update of the plugin againbut gives me a wide choice of map backgrounds even when being offline and thus having no WMS service at hand.

GPS Tools I also use frequently to add waypoints taken outdoor to my local databases. Finally, Table Manager is a good tool to add and delete fields before adding the data to the spatialite databases I created. By now, the Openlayers plugin still suffers many problems, and I have replaced it with QuickMapServices for online tile services and TileLayerPlugin for local tilesets. It's more of a housekeeping plugin, but Zip Layers is essential for me. I use it in two ways:. The plugin creates individual zip files containing a shape file of each of the layers you select.

CRS and metadata is kept intact.

qgis plugins

Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. What QGIS plugins do you consider to be essential? Asked 8 years, 2 months ago. Active 3 years, 2 months ago. Viewed 5k times. What QGIS plugins do you consider to be essential - vector, raster, geoprocessing plugins?Loading GPS data from a file. Downloading GPS data from a device.

Uploading GPS data to a device. Defining new device types. GPS, the Global Positioning System, is a satellite-based system that allows anyone with a GPS receiver to find their exact position anywhere in the world. GPS is used as an aid in navigation, for example in airplanes, in boats and by hikers. The GPS receiver uses the signals from the satellites to calculate its latitude, longitude and sometimes elevation.

Waypoints, routes and tracks are the three basic feature types in GPS data. QGIS displays waypoints in point layers, while routes and tracks are displayed in linestring layers. There are dozens of different file formats for storing GPS data. To load a GPX file, you first need to load the plugin. Activate the GPS Tools checkbox.

GPS Tools. Create new GPX Layer. See section Downloading sample data for more information about the sample data. Use the Browse… button to select the GPX file, then use the checkboxes to select the feature types you want to load from that GPX file. Each feature type will be loaded in a separate layer when you click OK.

GPS units allow you to store data in different coordinate systems. Version 1. Here, you select the file that you want to import and the file typewhich feature type you want to import from it, where you want to store the converted GPX file and what the name of the new layer should be.

Note that not all GPS data formats will support all three feature types, so for many formats you will only be able to choose between one or two types. Here, we select the type of GPS device, the port that it is connected to or USB if your GPS supports thisthe feature type that you want to download, the GPX file where the data should be stored, and the name of the new layer. If none of the available types work with your GPS device, you can create a new type see section Defining new device types.

The port may be a file name or some other name that your operating system uses as a reference to the physical port in your computer that the GPS device is connected to. This tool is very useful in combination with the vector-editing capabilities of QGIS.

It allows you to load a map, create waypoints and routes, and then upload them and use them on your GPS device. There are lots of different types of GPS devices.

You do this by using the GPS device editor, which you start by clicking the Edit Devices button in the download or the upload tab. To define a new device, you simply click the New Device button, enter a name, enter download and upload commands for your device, and click the Update Device button.

The name will be listed in the device menus in the upload and download windows — it can be any string. The download command is the command that is used to download data from the device to a GPX file. These are command-line options that tell GPSBabel which feature type to download. The upload command is the command that is used to upload data to the device.

Once you have created a new device type, it will appear in the device lists for the download and upload tools. QGIS comes out of the box with a pre-defined profile to download from Garmin devices. Connect the unit.QGIS has been designed with a plugin architecture. Many of the features in QGIS are actually implemented as either core or external plugins.

Managing plugins in general means loading or unloading them using the Plugin Manager. To deactivate and reactivate external plugins, the Plugin Manager is used again. Plugin Manager. The Installed menu of the Plugin Manager lists all the available plugins and their status loaded or unloadedincluding all core plugins and all external plugins that have been installed and automatically activated using the Get more menu see Section Loading an external QGIS Plugin.

Those plugins that are already loaded have a check mark to the left of their name. To enable a particular core plugin, click on the checkbox to the left of the plugin name, and click [OK].

When you exit the application, a list of loaded plugins is retained, and the plugins are automatically loaded. You can find the external plugins in the Get more menu. In the Installed menu you can see the path if it is an external plugin. For other external repositories, they might be available with the external plugins themselves. In general it is not included in this manual.

Some of these plugins offer functionality that will be required by many users for example: providing the user with the ability to view and edit OpenStreetMap data, or to add GoogleMap layers while others offer very specialized functions for example: Calculate economic pipe diameters for water supply networks.

If you do not want one or more of the added repositories, they can be disabled via the [Edit As such, we cannot take any responsibility for them.

You can also manage the repository list manually, that is add, remove, and edit the entries. Temporarily disabling a particular repository is possible by clicking the [Edit Plugin Settings. You can stay informed about plugins. Activate the checkbox Check for updates on startup from the Settings menu.

QGIS will inform you whenever a plugin or plugin update is available. Outdated version of the documentation.


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