whuber

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Consultant (environmental stats a specialty) and teacher.


419 Answers

newest activity votes
68
Why is the 'straight line' path across continent so curved?
66
How to measure the accuracy of latitude and longitude?
59
How much math does a GIS Analyst need to know?
32
How to find the center of geometry of an object?
30
One dimensional map of the world?
29
Why do we use the terms “longitude” and “latitude” for a spherical body?
28
Algorithm for offsetting a latitude/longitude by some amount of meters
25
What's the difference between a projection and a datum?
24
“Oddities” in the Shapefile technical specification
23
How to divide a polygon into specific sizes using ArcGIS?
22
How accurate is approximating the Earth as sphere?
22
Recommend topics to be included in a Computer Science for Geospatial Technologies course
22
Producing building shadows?
22
Why is law of cosines more preferable than haversine when calculating distance between two latitude-longitude points?
22
What are the benefits of Multipart Features?
21
How to build an artificial 'dam' across a river?
20
Are ellipsoids a mathematical necessity?
20
How can I conduct Geographically Weighted Principal Component Analysis using ArcGIS, Python and SPSS/R?
18
How much Water on Earth(USGS) : A Wrong Map representation?
18
How to compare two spatial point patterns?
16
When to use which Shapefile attribute data type?
15
Minimum number of samples for kriging interpolation
15
How to find the minimum-area-rectangle for given points?
15
What is the most accurate coordinate system for calculating areas of polygons?
15
What resampling technique should be used when projecting aerial photos?
15
Random sampling of raster using R
15
Curved point-to-point “route maps”
15
How to create an accurate Tissot Indicatrix?
15
Algorithm to find nearest point
14
Trilateration algorithm for n amount of points
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