on February 22, 2023
Column fields that are part of a join convert to null or 0 when exported
Geographic Information SystemsWhy does the attribute table have null or empty values after a join? After performing a join, the values in the fields from the joined table might appear empty or null. Null values can be the result of several factors: Values in the specified fields for the join do not match. Joins are case sensitive,
on February 22, 2023
Setting up MapServer WMS and use it with OpenLayers
Geographic Information SystemsHow do I add a WMS layer to Geoserver? Adding an external WMS To start, in the Web administration interface, navigate to Stores ‣ Add a new store ‣ WMS. The option is listed under Other Data Sources. Name of the workspace to contain the store. This will also be the prefix of all of
on February 22, 2023
How to Convert labels to Annotation
Geographic Information SystemsHow do I turn labels into annotations? To convert labels from one layer, right-click the layer in the ArcMap table of contents. To convert labels from more than one layer, right-click the data frame. Click Convert Labels to Annotation. For Store Annotation, click In a database. How do I convert labels to annotations in ArcMap?
on February 21, 2023
Do PNG files suffer performance for scaled read over ERDAS Imagine (.img) files?
Geographic Information SystemsWhat is erdas Imagine file format? ERDAS Imagine is a software package designed for working with GIS raster data. It has its own binary “img” format for images. The content of this file can vary: it can be a georeferenced image or a GIS grid file. The . img file can be associated with corresponding
on February 21, 2023
Clipping raster by multiple datasets or polygons?
Geographic Information SystemsHow do I clip multiple rasters? 3.4. 3.8. Clip multiple rasters¶ Select input band set : select the input Band set to be clipped; Use value as NoData : if checked, set the value for NoData pixels (e.g. pixels outside the clipped area); Output name prefix : set the prefix for output file names (default
on February 21, 2023
Why won’t mapbox map load into DIV container?
Geographic Information SystemsWhy is Mapbox not working? Maps can fail to load for a variety of reasons related to your Mapbox account, your code, the browser you are using, the network you are on, or your computer. How do I embed a Mapbox? Quote from video: In this video I'll show you how to take a map
on February 21, 2023
Error handling with python script in ArcGIS 10
Geographic Information SystemsHow do I run a Python script in ArcGIS 10? The simplest way to use Python in ArcGIS is to enter Python commands into the Python window. The Python window prompts with three greater-than symbols (>>>), indicating the first line of the code block to execute. Simple Python syntax can be immediately entered and executed
on February 21, 2023
Calculate NDVI by avoiding use some unusual values of surface reflectance of NIR and Red bands included in an image collection
Geographic Information SystemsWhat is the formula for calculating NDVI from multispectral imagery? NDVI = (NIR-R) ./ (NIR + R); % [In this step I couldn’t use / to compute, could you tell me why?] How to calculate NDVI from Landsat 8 in R? In Landsat 8-9, NDVI = (Band 5 – Band 4) / (Band 5 +
on February 21, 2023
Reproducing drag-n-drop for Feature Classes using ArcPy in ArcGIS Pro
Geographic Information SystemsHow do I duplicate a feature class in ArcGIS Pro? , follow these steps: In the Catalog pane, connect to the geodatabase or database that contains the feature dataset, feature class, or table you want to copy. Right-click the feature dataset, feature class, or table and click Copy . Right-click the geodatabase to which you
on February 21, 2023
Why can I see the data from a second sde database connection in my database?
Geographic Information SystemsWhere are SDE connection files stored? Download the SDE Connection File The file is available at the following location: http://geo.appstate.edu/sites/geo.appstate.edu/files/10.sde Save the file locally on your machine. The default path where this file should be saved is: C:\Users\\AppData\Roaming\ESRI\Desktop10. Where are ArcGIS Pro SDE connection files stored? Server connection files created in ArcGIS Pro are stored