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Showing posts from December, 2018

Download Online Maps and Imagery using QGIS

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Needs for High Resolution Imagery is important for many GIS analyst. Sometimes those imagery are coming with not so cheap price. Not many people can have access to those data. But with the recent development of Online Mapping Platform, there are many online map providers gave API services for free to access global level of satellite imagery with no cost, for example Google Earth Pro, Bing, ArcGIS Online, HERE Maps, and many others.  The video below show you a way to get those online high resolution satellite imagery through QGIS Software (that you can also get for free because it is open sourced). Those online basemap and high resolution imagery can be downloaded using QGIS, what you needs to have is just quite fast internet connection.  I am not guarantee that the method shown on the video will always working with QGIS no matter the version, but if you are find some problems with the latest QGIS version, you can always rollback to older version to make this works. Well actual...

Simple Least Cost Path Analysis in QGIS

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Generate Single Mosaic Raster/Map from Map Tiles (Basemap Series Part 6)

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This post is designed as continuation from previous Post .  Now if you understand from my previous blog posts, many online map providers publish their online maps as tiled raster/vector map. There also many geospatial data format has been developed to store these tiles. One of them is MBTILES Format. MBTILES stores all tiles into one packed file grouped into its respective zoom levels. Because the tiles structure inside the MBTILES has been standardized, mosaicking those tiles into one single raster dataset is pretty much possible. There are plenty ways to do the mosaicking, one of them is utilizing MOBAC software. You can also use SasPlanet to do this. At my previous post, I show you how to make custom styles of Google Maps using snazzymaps, now I will continue to generate single raster maps of my Area of Interest from the custom google maps. Here is the workflow 1. From my previous post, the endpoint URL of my custom styled Google Maps is shown below. https://ma...

Modify Google Maps Vector Tiles and Open it in QGIS (Basemap Series Part 5)

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It is been a while since last time I discuss about vector tiles basemap. And today I found something cool that may be useful for you too. As you already know, Google nowadays is also publish it online maps to vector tiles format which make their maps more beauty as well as faster to load. And because vector tiles based online maps can be stylized in a custom way, there goes also the google maps vector tiles. You can modify how it looks to suit your application needs without spending additional money or resources. Now, lets go to how to do that. 1. First, go to application that enabling us to customize the Google Maps style using CSS.  https://snazzymaps.com is one example. You can explore styles made by other people or make a new style for yourself if you have enough knowledge about CSS. 2. After you find certain style that you are interested in, go to inspect element (chrome) or Firebird (Firefox) and find out the URL for a tile image. Below is an example. https:/...

How to Generate Vector Elevation Class Map from DEM in ArcGIS

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