on December 29, 2022
Merge raster in QGIS
Geographic Information SystemsHow do I combine two raster layers? Open the Mosaic To New Raster tool by navigating to ArcToolbox > Data Management Tools > Raster > Raster Dataset. Insert the raster files. Select the output location. Specify a name and extension for the output. Specify the pixel type. Specify the number of bands. How do
on December 29, 2022
How to calculate number of pixels in a TIFF
Geographic Information SystemsHow many pixels is a TIFF file? 150-300 ppi Tiff files are designed for high-quality publications, and therefore normally are saved at higher resolutions, usually 150-300 ppi. Jpg files are designed for the internet, and therefore saved at lower resolutions, usually 72 ppi. How to calculate pixel size? The pixel dimensions may be determined by
on December 29, 2022
Calculating individual width between buildings using ArcMap?
Geographic Information SystemsHow do you measure distance between two features in ArcGIS? Steps Click the Measure tool. on the Tools toolbar. Click the Measure A Line button or the Measure An Area button . Sketch the desired shape on your map. Double-click when you want to end the line or polygon, and the measurements are displayed on
on December 29, 2022
Specifying attributes for network dataset?
Geographic Information SystemsWhat are the attributes of network? Network attributes have five basic properties: name, usage type, units, data type, and use by default. What are the different network attributes you consider to identify the issue? Network attributes consist of costs, restrictions, descriptors, hierarchy, and time zones. What is a network dataset in GIS? A Network dataset
on December 29, 2022
Creating tiles from GeoTIFF?
Geographic Information SystemsWhat is a GeoTIFF tile? GeoTIFF Organization Tiling creates a number of internal ’tiles’ inside the actual image, instead of using simple ‘stripes’ of data. With a stripe of data then the whole file needs to be read to get the key piece. How do I make tiles in QGIS? Open “Generate XYZ Tiles (Directory)”
on December 29, 2022
“Error HRESULT E_FAIL has been returned from a call to a COM component.” during using geoprocessor by VB.net
Geographic Information SystemsWhat is error Hresult E_fail has been returned from a call to a COM component? @zezba9000 – HRESULT E_FAIL returned from a call to a COM component is a generic error that can be applied to any COM components. This feedback ticket is about the error happening when trying to add a reference to a
on December 29, 2022
WMS Request with Authentication in Leaflet from Geoserver
Geographic Information SystemsDoes leaflet support WMTS? Leaflet does not understand WMS GetCapabilities documents. Instead, you have to create a L. TileLayer. WMS layer, provide the base WMS URL, and specify whatever WMS options you need. Is GeoServer a WMS? The OGC Web Map Service (WMS) specification defines an HTTP interface for requesting georeferenced map images from a
on December 29, 2022
ExtractByMask with one mask and multiple layers ArcMap?
Geographic Information SystemsWhat is the difference between clip and extract by mask? Clip only does a rectangular area (envelope) however extract by mask will extract to an irregular/multipart/doughnut polygon. If you want only the data in an extent use clip, it’s much faster, but if you need to trim to an irregular shape then use extract by
on December 29, 2022
Sentinel-2 images color cast
Geographic Information SystemsWhich band is red in Sentinel 2? Sentinel-2 carries the Multispectral Imager (MSI). This sensor delivers 13 spectral bands ranging from 10 to 60-meter pixel size. Its blue (B2), green (B3), red (B4), and near-infrared (B8) channels have a 10-meter resolution. What are the bands in Sentinel 2A? Sentinel-2A and 2B Satellite Sensor Specifications MSI
on December 29, 2022
Export XML Data to a MySQL DB
Geographic Information SystemsHow can we transfer XML data to MySQL table? To import data from a XML file into a MySQL table, select the table in Object Browser and select Table -> Import -> Import XML Data Using Load Local… or(Ctrl+Shift+X). Tables: The list of all tables of the currently active database is shown. Select the Table