Update point coordinates in QGIS after manually moving locations in edit mode
Hiking & ActivitiesHow do I change a point coordinate in QGIS? Click the down arrow next to the icon and select “add new shapefile” from the options. From the pop-up window select point. You can also change the coordinate system (the default is the set coordinate system of your QGIS file) and add any attribute fields you
Customized popup in OpenLayers
Hiking & ActivitiesHow do I create a pop up in OpenLayers? Click on the map to get a popup. The popup is composed of a few basic elements: a container, a close button, and a place for the content. To anchor the popup to the map, an ol/Overlay is created with the popup container. How do I
What causes wrong placement of JPGs in QGIS 2.8.1?
Hiking & ActivitiesHow do I georeference a JPEG in QGIS? To georeference the map: Open the georeference tool, Raster ‣ Georeferencer ‣ Georeferencer. Add the map image file, rautjarvi_map. When prompted find and select the KKJ / Finland zone 2 CRS, it is the CRS that was used in Finland back in 1994 when this map was
PostgreSQL query using GROUP BY question
Hiking & ActivitiesHow to use group by clause in PostgreSQL? The PostgreSQL GROUP BY condition is used with SELECT command, and it can also be used to reduce the redundancy in the result.The basic syntax of the GROUP BY clause is as follows: SELECT column-list. FROM table_name. WHERE [conditions ] GROUP BY column1, column2…. columnN. ORDER BY
Shapefile and multiple lines of census data QGIS
Hiking & ActivitiesHow do I add population data in QGIS? Calculate the Population Density Right click the “SubPlace” layer in the TOC’ Select “Open attribute table” Toggle editing mode by click the button with a pencil. Click the “Create a new column” button. Name the new column “POPDENS” For “Type” select “Decimal number” Set the width to
Finding the side of a square that a point intersects with R (sp)
Hiking & ActivitiesHow do you find the point of intersection of a square? So we can find the point or points of intersection by solving the equation f(x) = g(x). The solution of this equation will give us the x value(s) of the point(s) of intersection. We can then find the y value by putting the value