on December 27, 2022
Convert land-based camera image pixel x,y to ground lat/long or x,y,z
Geographic Information SystemsHow do you change XY coordinates to latitude and longitude? Calculate latitude and longitude using the formula: latitude = asin (z/R) and longitude = atan2 (y,x). In this formula, we have the values of x, y, z and R from step 2. Asin is arc sin, which is a mathematical function, and atan2 is a
on December 27, 2022
Find records with highest value based on unique ID
Geographic Information SystemsHow to get max value with id in SQL? To find the maximum value of a column, use the MAX() aggregate function; it takes a column name or an expression to find the maximum value. In our example, the subquery returns the highest number in the column grade (subquery: SELECT MAX(grade) FROM student ). How
on December 27, 2022
Field Collection Apps for Windows 8
Geographic Information SystemsWhich tool is best for data collection? Top 12 Data Collection Tools of 2022 Magpi. Jotform. FastField. Zonka Feedback. Forms on Fire. GoSpotCheck. Zoho. Paperform. What are the 8 methods of collecting data? Eight super-effective data collection methods to try Online forms and questionnaires. Online forms are one of the most sought-after and effective primary
on December 27, 2022
Data sources are missing spatial reference data
Geographic Information SystemsHow do I fix missing spatial reference in Arcgis? Define missing spatial reference Add a new folder connection in the Catalog pane that has the dataset for which you want to specify the spatial reference. Tip: Right-click the dataset. Click Properties . Click the spatial reference button . Choose the appropriate spatial reference. How do
on December 27, 2022
Why when I do an intersect analysis on a point feature class to a line feature class I only get ‘one’ point result?
Geographic Information SystemsHow does Intersect analysis work? The Intersect tool calculates the geometric intersection of any number of feature classes and feature layers. The features, or portion of features, that are common to all inputs (that is, they intersect) will be written to the output feature class. How do I merge two feature classes in Arcgis pro?
on December 27, 2022
How would I draw and visualize custom maps based on OSM data?
Geographic Information SystemsHow do you draw on OSM? A new line Step 1: Enter edit mode by. Step 2: Select on the right side Draw a line. Step 3: Move the cursor to the first point and click. Continue for subsequents vertices of the line. Step 4: Click once more on the last vertex to indicate that
on December 27, 2022
How to add a Google Maps layer to Openscales?
Geographic Information SystemsCan I add a layer to Google Maps? Open or create a map. You’ll see your layers in the box on the left. Make the changes you want. Add a layer: Click Add layer. Can I use Google Maps with OpenLayers? Unlike Bing Google does not allow its map tiles to be used directly in
on December 27, 2022
Show differenet SVG icons on one layer at runtime
Geographic Information SystemsHow to inline SVG icons? Our Process to add new SVG icons Use vector graphic tool to create your icon. Export the outcome as an SVG file. We use Inkscape and Affinity Designer for iPad. Configure svg-sprite.js to create an SVG sprite file for you. Inline SVG icons into your HTML file. Configure colors and
on December 27, 2022
What does “foo” stand for in this PostGIS command?
Geographic Information SystemsWhat is foo in PostgreSQL? ‘foo’ is the name that has been assigned to the sub-selection. It has no function other than being syntactically necessary – a sub-selection in PostgreSQL must have a name assigned to it, but it does not matter what the name is. How to check object type in PostgreSQL? In PostgreSQL,
on December 27, 2022
ArcGIS Pro Unique Values with Domains Does not Display Correct Number of Classes
Geographic Information SystemsHow do I change the number of classes in ArcGIS? Click the Symbology tab. Click the Classify button. Click the Method arrow and click Manual. Click the up/down arrow of the Classes input box until the desired number of classes is reached. How do I get unique values in ArcGIS Pro? To create a unique