on December 31, 2022
Online service to transform coordinates from WGS84 to NZTM and NZMG?
Geographic Information SystemsHow to convert WGS84 to UTM? How to use the Coordinates Converter: Select the Input SRS (the default format is WGS843). Input the coordinates in a decimal degrees (DD)4 format. Select the Output SRS (the default format is UTM – N31). Click “Convert” to quickly convert coordinates. How to convert easting and northing to latitude
on December 31, 2022
Producing multiple map PDF from Excel file with each record being two lat/long pairs?
Geographic Information SystemsHow do I create a map with multiple locations in Excel? Quote from video: Button over here in the top left scroll. All the way down to your places. Click on maps. And down at the bottom it says create Maps. How do I map two rows in Excel? To map multiple fields at a
on December 31, 2022
Removing slivers after splitting a polygon with a line
Geographic Information SystemsHow do I remove a sliver polygon in ArcGIS? You can inspect the selected polygons to see if they are slivers, then either use the Editor > Merge command or the Eliminate geoprocessing tool (requires an ArcGIS for Desktop Advanced license) to merge the slivers with neighboring polygons. How do you split a polygon or
on December 31, 2022
QGIS Version 3.6 Raster Calculator
Geographic Information SystemsWhere is raster calculator in Qgis? Go to Processing ‣ Toolbox ‣ Raster analysis ‣ Raster calculator tool. Double-click to open it. How to do raster calculation in QGIS? To add a raster to the raster calculator expression field, double click its name in the Fields list. You can then use the operators to construct
on December 30, 2022
QGIS – some edit feature options disabled in vector layer
Geographic Information SystemsHow do I edit a vector layer in QGIS? In QGIS you can find these options in Settings > Options > Digitizing or in Settings > Snapping Options. This will optimize the editing process of the layers. Make sure you check the Default snap mode to > Vertex and segment.Jun 19, 2018 How do I
on December 30, 2022
How fast GPS position estimates fluctuate?
Geographic Information SystemsHow accurate is GPS positioning? The government provides the GPS signal in space with a global average user range rate error (URRE) of ≤0.006 m/sec over any 3-second interval, with 95% probability.Mar 3, 2022 What is SV position in GPS? SV Time is the time maintained by each satellite. Each SV contains four atomic clocks
on December 30, 2022
Find lines entering a polygon with QGIS
Geographic Information SystemsHow to use topology checker in QGIS? Checking Polygon Topology Error Add polygon layer to QGIS. For this tutorial I used building polygon. Click Topology Checker plugin. In the panel click Configure. The Topology Rule Settings window will appear as in figure 6. Click Validate, and then the error will appear and marked with red
on December 30, 2022
Extract data from a WMS with database
Geographic Information SystemsHow do I download WMS data? To do this: Click on the Get Data From Map icon to bring up the Virtual Earth Map Locator. Select the desired location in the Virtual Earth Map Locator dialog. The Data Services Options dialog will appear next. WMS will then ask you to save the file as a
on December 30, 2022
Small sample size for geographically weighted regression; limitations
Geographic Information SystemsWhy do we use geographically weighted regression? GWR is useful as an exploratory technique – its usefulness as a prediction tool is controversial – it allows visualization of stimulus-response relationships and if/how that relationship varies in space. It also accounts for spatial autocorrelation of variables. Is geographically weighted regression machine learning? Machine Learning Methods Geographically-weighted
on December 30, 2022
Check Geometry – Bad Envelope
Geographic Information SystemsWhat makes a geometry invalid? Geometry that is considered invalid meets one of the following conditions: Empty—This condition occurs when the geometry of a feature has zero points and does not contain geometric information, represented by SHAPE_LEN and SHAPE_AREA fields, beyond its original initialization state. How do I fix invalid geometry in Arcgis? Start ArcMap.