Joining xls file with shapefile attribute through ModelBuilder?
Geographic Information SystemsHow do you join Excel to shapefile? Joining Shapefile – Excel In Join Layer select the Excel table In join field in the attached layer select the key field of your Excel table. In Join field in the target layer select the key of your shapefile. Click OK to close the join definition window. Click
Limited CRS options of GeoServer WMS
Geographic Information SystemsWhat are the raster rendering options in GeoServer WMS? Raster Rendering Options GeoServer supports three resampling methods that determine how cell values of a raster are outputted. These sampling methods-Nearest Neighbor, Bilinear Interpolation and Bicubic-are available on the Default Interpolation menu. What is WMS in GeoServer? The OGC Web Map Service (WMS) specification defines an
I have tried gdal builidng from source and rpm and still get the following error trying to create the postgis extension
Geographic Information SystemsHow do I enable PostGIS extensions? Load the Extension Use the CREATE EXTENSION command of PostgreSQL to create a new extension for PostGIS: =# CREATE EXTENSION postgis ; The PostGIS extension should now be loaded into the database. How to install PostGIS extension? For a Windows install: Go to the Windows PostgreSQL download page. Select
Spatial reference for dummies?
Geographic Information SystemsWhat is meant by spatial reference? A spatial reference describes where features are located in the world. Most spatial references will be either geographic (using a geographic coordinate system) or projected (using a projected coordinate system). What are examples of spatial referencing? Common examples include the Universal transverse mercator (UTM) and national systems such as
Converting KML file to layer on existing map in ArcGIS Desktop?
Geographic Information SystemsHow do I convert KML to layer in ArcGIS? Using the KML to Layer tool, select the KML layer from your Contents menu and drag it into the Input KML File parameter on the tool. After it has been converted, perform the geoprocessing operations on the new output. How to convert KML file to shapefile
Why is “define projection” in ArcGIS not working on my GeoTIFFs? Problem with the extent?
Geographic Information SystemsHow do I fix ArcGIS projection? Answer Open ArcToolbox and select Data Management Tools > Projections and Transformations > Define Projection. Choose the appropriate coordinate system. You have to define it as what it is, not as what you want it to be. Once the projection is defined correctly, the projection can be changed.
How should I implement a many-to-many relationship in a web mapping application?
Geographic Information SystemsHow do you implement a many-to-many relationship? For those relationships, you simply connect the appropriate fields with a line. To create many-to-many relationships, you need to create a new table to connect the other two. This new table is called an intermediate table (or sometimes a linking or junction table). What are the examples of
Why does MapBox serve trasparent pixels only below a certain zoom level?
Geographic Information SystemsWhat is the zoom level limit on Mapbox? Mapbox provides maps in 23 zoom levels, with 0 being the lowest zoom level (fully zoomed out) and 22 being the highest (fully zoomed in). What are Mapbox tiles? Mapbox vector tiles are designed to visualize a large amount of data on a map in a scalable
QGIS Modeler: Layer Rename does not output
Geographic Information SystemsHow do I rename a layer in Qgis? Quote from video: So what i'm doing i'm changing the names of the layers not the files to shorten names how to do that right click properties. Here you have under source you have the layer. Name in this case. Is there a model builder in Qgis?
Cannot load vectorlayer PyQgis
Geographic Information SystemsHow to load layer in QGIS? If you have a georeferenced image or aerial imagery, you will need to import them using the Add Raster Layer button. To import a raster file, follow these steps: Click on the “Layer” menu, mouse-over “Add Layer” and click on “Add Raster Layer…” or click on the “Add Raster