#MAPUBLISHER WMS GOOGLE EARTH SOFTWARE#
#MAPUBLISHER WMS GOOGLE EARTH CODE#

Layer_styling>simple marker>Size>menu>Assistant….Use the styling assistant to setuip the graduated symbols:.Graduated Symbols: Load ne_10m_states_provinces, ne_10m_populated_places, view the attibute table and have the students locate the field for population on the pop_places dataset.Reinforce the concept of a memory layer vs. Delete by selection tool, Delete by row selection in attribute table, select by expression, delete selected features. Make a rectangle and clip the geology layer to the rectangle.

Editing: Introduce the editor toolbar, memory layers and basic editing tools.Use this opportunity to style the layer, label it, and ask questions about the geology polygons, where are the sedimentary types, where are the igneous? Clip: Select a county from the Montana counties dataset, and clip the Montana geology dataset to the the county boundary.Calculate area of the output polygons via Vector>Analysis>Basic Statistics… Buffers: load a polyline layer (I chose a trails dataset), and create a half-mile buffer dataset.Use this oportunity to talk again about data types (.shp. Have the students unzip it in the downloads folder, look at the file types, copy it to their Users/Username/data folder and highlight the importance of keeping it organized.Add in the imagery layer and zoom around.Talk about getting data from the internet and how it will come in various levels of quality, extents, scales and projections.

Choose a polar projection and see the data ‘break’ Use EPSG codes via the qgis search dialogue in order to alleviate errors at this stage.

Choose a few other projections and reproject the map view.

Note the size of Greenland in relation to South America

Set the map view to EPSG: 8857 (Equal Earth) and talk area being preserved.

Set the map view to EPSG: 3857 and talk about disortion.

Lots of math happening behind the scenes… Talk about the ‘on-th-fly’ default and how datasets have a CRS, and the map view can have its own.

Load the 50m_admin_0_countries into qgis.

Zoom in and out with google maps to show the transition from a sphere to a 2d Pseudo-Mercator projection.

Talk about units and how units are associated with a projection/CRS.

Talk about how different projections preserve different attributes and are designed for different extents.

Show a globe and talk about a round-ish earth and what has to happen to made a 2D map of a 3d object.

I asked them answer questions about menus and specific purposes of certain functions.

I had a access to a smartboard, so I had all of the students gather around (away from their computers) to go over the concepts from Day 1 in a group format.

#MAPUBLISHER WMS GOOGLE EARTH CODE#

Javascript example code to create a silhouette of.If you want to load more images, then repeat the previous steps 3 to 8. If necessary, click the Fit image or Fit all images buttons in the sidebar to center the map display on the image(s). In the Geodetic Datum field, choose the horizontal datum of the image file, e.g.If the image file is in a projected coordinate system, then choose the correct projection in the Projection combo box.The positioning would be more accurate if the raster image were already in non-projected or Mercator coordinate system. Note: the raster image transformation for projected coordinate system to the Google Maps Mercator coordinate system is not very accurate. If the image file is in a projected coordinated system, then choose Projected.

If the image file is in the non-projected coordinate system, then choose Geographic in the Coordinate system type combo box.

Browse and select the corresponding ESRI world file e.g.

In the World file field, click the button.

In the Image file field, click the button.

In the sidebar, click the Import Images button.

To run the mapplet, simply go to the site.

I had to use the HTML5 FileReader objects so only modern browsers such as Chrome, FireFox, Internet Explorer 10 will work. So after a few late nights, I completed writing this Google Mapplet to load and display local image files with associated ESRI world files as custom overlays in Google Maps. I wanted to be able to do the same using just a modern browser and an Internet connection.

#MAPUBLISHER WMS GOOGLE EARTH SOFTWARE#

In standard desktop GIS software applications, it is a common task to display geo-referenced images.

Mapublisher wms google earth