Tag: vector image

Download Algeria Administrative Boundary Shapefiles – National, Districts, Municipalities and more

Algeria Shapefile Download Map – Free Polygon Administrative Download. Shapefiles showing Districts , Municipalities and Town and Cities.

Have you been searching too long for accurate GIS data for your country of interest? Well the wait is over with MAPOG, your one-stop destination for comprehensive GIS data covering 150+ countries. You can find more than 150 GIS data for each nation in MAPOG GIS Data Collection. The distinctive feature of MAPOG GIS data collection lies in its commitment to providing highly accurate GIS data of the administrative divisions. Users can also find data of other natural and man made geographic features such as river, roads, railway lines, airport locations etc. that are represented in appropriate geometric structures (point, line and polygon). MAPOG provides two important tools for accessing these GIS datasets – Download GIS Data and Add GIS Data.

With MAPOG’s versatile toolkit, you can effortlessly upload vector and raster files, add WMS (Web Map Service) layers, upload Excel or CSV data, incorporate existing files, perform polygon splitting and merging, generate new polygon and polyline data, use the converter for various formats, conduct buffer analysis, create grids, transform points into polygons, calculate isochrones, and utilize the geocoder for precise location information.

We offer an extensive array of data formats, including KML, SHP, CSV, GeoJSON, Tab, SQL, Tiff, GML, KMZ, GPKZ, SQLITE, Dxf, MIF, TOPOJSON, XLSX, GPX, ODS, MID, and GPS, ensuring compatibility and accessibility for various applications and analyses.

Note:

  • All data available are in GCS datum EPSG:4326 WGS84 CRS (Coordinate Reference System).
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Download Shapefile Data of Algeria

Algeria is bordered to the northeast by Tunisia; to the east by Libya; to the southeast by Niger; to the southwest by Mali, Mauritania, and Western Sahara; to the west by Morocco; and to the north by the Mediterranean Sea. It is considered part of the Maghreb region of North Africa. It has a semi-arid geography, with most of the population living in the fertile north and the Sahara dominating the geography of the south. Algeria covers an area of 2,381,741 square kilometres (919,595 sq mi), making it the world’s, tenth largest nation by area and the largest nation in Africa, more than 200 times as large as the continent’s smallest country, The Gambia. With a population of 44 million, Algeria is the tenth-most populous country in Africa, and the 32nd most populous country in the world. The capital and largest city is Algiers, located in the far north on the Mediterranean coast.

Algeria National Boundary
Algeria National Boundary

Download Algeria National Boundary Shapefile

Download Algeria Districts Shapefile Data

Algeria’s districts were created as arrondissements when Algeria was a colony of France and they had a status equal to those of mainland France. They were, like France’s arrondissements, part of departements, which are further part of a région (which was called a territory, territoire, in French Algeria). They were maintained 6 years after the country’s independence (until 1968) when they were renamed “daïras” and had their functions slightly changed.

Algeria Districts Boundaries
Algeria Districts Boundaries

Download Algeria Districts Boundaries Shapefile

Download Algeria Municipalities Shapefile Data

The municipalities of Algeria form the third level of administrative subdivisions of Algeria. As of 2002, there were 1,541 municipalities in the country.

Algeria Municipalities Boundaries
Algeria Municipalities Boundaries

Download Algeria Municipalities Boundaries Shapefile

Other Administrative Boundary Data:

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Disclaimer : If you find any shapefile data of country provided is incorrect do contact us or comment below, so that we will correct the same in our system as well we will try to correct the same in openstreetmap.

Geo-Referencing raster image in QGIS w.r.t. vector file

Geo-Referencing raster image in QGIS with respect to vector file. Geo referencing is the process used to provide geographical information to the raster images like cadastral maps, physical maps and satellite imagery with the help of projection or coordinate system. As an ordinary raster image formed by the number of pixel which has no particular size,  Geo-referencing gives a particular coordinate to a pixel with respect to the ground point, it represents. Thus every individual pixel get its coordinate and size.

Look for other QGIS tutorial.

There are many GIS tools which perform Geo-referencing like ArcGIS, PCI Geomatica, Erdas Imagine, QGIS etc. Here Geo-referencing is shown in QGIS:

Geo-Referencing raster image in QGIS with respect to vector file

In QGIS first start with loading the vector file in QGIS environment by click on add vector layer.

Geo-Referencing raster image in QGIS with respect to vector file
Geo-Referencing raster image in QGIS

Once the vector layer is loaded it can be given symbology by right click on the layer in the layers window. For geo-referencing the click on the georefrencer tab present at bottom of the QGIS environment window as shown below.

Geo-Referencing raster image in QGIS with respect to vector file
Geo-Referencing raster image in QGIS

This will open a new window named Georeferencer . In this window open the raster image to be referenced by click on the tab open raster layer present on the top left corner.

Geo-Referencing raster image in QGIS with respect to vector file
Geo-Referencing raster image in QGIS with respect to vector file

When raster is open in the georefrencer window to add control points according to which raster will be georefrenced click on the add point button on the tool bar. Control points are the coordinate points of the ground or the projected coordinates.

Geo-Referencing raster image in QGIS with respect to vector file
Geo-Referencing raster image in QGIS

These control points may be enter manually or from the map canvas as here reference is vector layer which is present on the map canvas. click on from map canvas on Enter map coordinates window.

Geo-Referencing raster image in QGIS with respect to vector file

This will open the map canvas or main QGIS window , select the point of reference on the vector layer.

Geo-Referencing raster image in QGIS with respect to vector file

Selection of point on vector layer will fill in the XY coordinates on the Enter map coordinates window. In this way first control point is marked.

Geo-Referencing raster image in QGIS with respect to vector file
Geo-Referencing raster image in QGIS with respect to vector file

Following same procedure select more and more points with minimum residual error which is generated by the tool and shown in the GCP table window.

Geo-Referencing raster image in QGIS with respect to vector file

Residual error is the difference between the actual coordinate of the control points and the geographic coordinate created by control points. The residuals represent the level of accuracy of the georefrenced images.

Check more :

Georeference on Map image with Geo Coordinates Control

Change projection of a georeference

These georefrenced images can be placed in the layers of any Geographic information system and can be used to locate points on the ground. Feel free to comment below, if you are having any problem to Geo-Referencing raster image  or if you want to discuss for the same topic.