Help to manage this app.

Manage your layers

In the 'WMS tab', you can manage your layers. In the part 'Base Layer', you can toggle one of the predefined WMS layers. Selected layer appears in the main window.

In the lower part 'Overlays', you have predefined vector layers. By checking/unchecking checkbox next to a layer, you can control its visibility. In the beginnig all vector layers are empty.

Import new WMS layer

By clicking on the button 'Import WMS' in 'WMS tab', you can add your own WMS layer.

If you click on the button, simple dialog appears. In the text field named 'URL' write url addres of WMS server. Confirm url with 'OK' button. Then fill in desired name of the new WMS map into the 'WMS name' text field. Select layers you want to include into the map. Select coordinate system. Application supports only Google Mercator coordinate system, supported EPSG codes are marked with green color. In case you select different system the map does not appear properly. Finally click 'Submit' button to add layer.

Add new vector layer

In the 'Editing tab' click on the button 'Add vector layer'. Type name of new layer and select its geometric type. By clicking on 'OK', new empty layer is added into the map.

Change layer symbology

You can change the color of vector layers by clicking on 'Change color' button in 'Editing tab'. Here you can select layer you want to change and new color (color dialog appears after clicking on colored field). 'OK' save your changes.

Draw new feature

At first, click on 'Draw' in 'Editing tab'. Then select layer you want to draw in from combobox below, it activates drawing tool. Now you can draw in map with left mouse button. Doubleclick finishes drawing of feature. Geometry type of new feature is defined by the type of the selected layer.

Note: You can draw holes in polygon analogously when you hold down CTRL key.

Modify feature

Modifying mode is activated by 'Modify' button in 'Editing tab'. Then click on the feature to modify it. You can move existing vertices or add new by moving lighter vertices in the middle of the segment. To remove vertex, press DELETE when mouse pointer is on vertex.

Remove feature

Activate remove mode by clicking on the 'Remove' button in 'Editing tab'. Then just click on the feature you want to delete and confirm dialog, which appears.

Add or edit feature description

Each feature drawn in application has attribute for description. There are two ways how to edit this attribute.

  1. In drawing mode check 'Ask for description value' in 'Editing tab'. When you finish drawing of the feature, dialog asking for description value appears.
  2. To edit description of existing feature, go to modify mode (click on 'Modify' button). Then check 'Ask for description value' in 'Editing tab'. When you click on the feature, you can edit its description.

Browsing features

You can browse your features in the 'Data tab'. Here you can select only features with some desired value by typing in 'Search' field above table. By clicking to a row in the table, map is zoomed into the corresponding feature extent.

Import data

You can import data in various supported formats (GeoJSON, KML, GML, Atom, GeoRSS, WKT, GEOX). Import is possible in 'Data tab' under the 'Import' button. In 'Import dialog', that appears, you can choose one or more files from your computer. Then it is necessary to specify right format in the combobox, this format must be common for all the imported files. After confirming dialog the files are imported as new vector layers. Name of new layer is the same as the name of imported file.

If the name of the file is the same as one of the existing layers, you can choose to import features into existing layer. Otherwise features are not imported and you need to rename layer and import it again.

Export data

You can export your features into various formats (GeoJSON, KML, GML, Atom, GeoRSS, WKT, GEOX). This can be done in 'Data tab' with 'Export' button. In the following dialog select desired format of exported file and layers to be exported (all or visible - visibility can be managed in 'WMS tab'). If you check 'Each layer to one file' the files are exported in ZIP archive, otherwise all the features are exported into one text file. Finally, click 'OK' and select where you want to save exported file(s).