Tagged: datasource

If you’re a bit confused whether or not to use a file geodatabase (*.gdb) or a personal geodatabase (*.mdb)… Here’s everything you need to know.

TerraPop delivers internationally comparable environment and demographic data at a global scale – this includes raster, area-level and micro-data.

Lossless compression (like JPEG) retains values and lowers file size. However, lossy compression (like LZ77) reduces file size by eliminating redundancy.

We explore the differences between DEM (bare earth), DSM (natural and built environment) and DTM (vector contours and regularly-spaced points).

If you want to download Sentinel satellite data, then you’ve come to the right place. We show you step-by-step how to obtain free Sentinel satellite data.

From geodatabases to PostGIS, spatial databases have quickly become the primary method of managing spatial data effectively in a GIS.

Over the years, the USGS has been a driving force in the production of GIS data. The USGS formats we explore are DLG, DRG and DOQ.

Deploying efficient raster GIS compression techniques means reducing storage space. It can save money, time and also help network performance.

The main spatial data types are vectors and rasters. Rasters have grid cells while vectors are points , lines and polygons consisting of vertices & paths.

TIGER GIS data has transformed the GIS environment because it was the first nationwide digital map. It stimulated projects like MapQuest, Yahoo & Google.

Unsigned integer rasters are non-negative numbers. Signed integers can store negative values. IMG, TIFF & GRID formats are acceptable for signed integer

Turbo-charge your search for free GIS data with this list of 10 free, downloadable global GIS datasets from highly reputable sources – vector and raster.

Does it feel like a big challenge to find LiDAR data sources? Master the art of attaining LiDAR at no cost with this list of 6 free LiDAR data sources.

Natural Earth data is a free raster and vector (cultural and physical) data package containing the most common elements that you need to create a map.

The USGS Earth Explorer is quick and easy to download free Landsat imagery & other remote sensing data. Enter ROI, define timeline and download for free.

ArcGIS shapefile files are composed of mandatory files (SHP, SHX and DBF) and optional files (PRJ, XML, SBN and SBX). This article lists their functions.

Some of the best GIS weather data available can be found at NWS, PRISM, MADIS and Weather Source. This GIS weather data dates back from past to present.

Bit depth is the amount of detail in each pixel expressed in units of bits. 1-bit rasters contain 2 values while 8-bit rasters range from 0-255

Want to elevate your chances of finding a digital elevation model? Sure you do. You should dive into our list of free global DEM data sources.

If you’re searching for free satellite imagery, we rank the best sources of free satellite data from authoritative sources like NASA, USGS and DigitalGlobe.

Geodata is location data stored in a Geographic Information System (GIS). By using geographic data, we better tackle problems that require spatial thinking.

Topography lays the underlying foundation of the Earth’s surface. In this comprehensive guide, you’ll learn everything about topography and topographic maps.

When you want historical imagery, the best web viewers are Google Earth, Esri’s Wayback Living Atlas, USGS LandLook, NASA Worldview and Planet’s Stories.

Have you ever wanted to look deep into the ocean and see its topography? Turns out, you actually can with this list of ocean bathymetry data.

OpenStreetMap is like the Wikipedia of maps. As open is its key philosophy, this is also true for OSM data. Here’s how to download OpenStreetMap data.

Planet Labs (or simply Planet) started with one main idea: To capture our dynamic Earth… Every day. using an ultra-compact, inexpensive CubeSAT satellite.

If you’re looking for topographic maps (contours, place names & hydrography) for the United States, the first place to look is the USGS topo maps series.

Esri’s tapestry segmentation data provides insights on lifestyle choices made by customers helping you make more informative business decisions.

Over the span of your life, how much has the Earth changed? Quite a bit, but you probably just can’t put a number to it. You actually CAN with land cover.

Since 1999, NASA Earth Observatory has kept a close eye on the environment (fires, atmospheric gases, land use) and global climate change.

COGO (Coordinate Geometry) is a tool that maps the geometry from survey plans for land parcels, road allowances, and property easements.

We list the top geometric networks as GIS data sources that you can use for routing, geocoding, map display or any type of network analysis.

This post is dedicated to Antarctica data. If you’re trying to find data for the South Pole, then we have research stations, satellite imagery and much more.

These are the top 25 satellite maps in 2020. The best part? You’ll get to explore Earth in new ways that you’ve never thought possible. Let’s get started.

The expression goes: “You can’t manage what you can’t measure”. And for measuring climate, it’s world climate data that benchmarks the health of our planet.

How well do you know GIS formats? GIS technicians manage, share and create data in various geospatial data formats. See our list of GIS formats

From near real-time satellite views to live feeds, this article aims at showing you how to view a live satellite map of the world.

This article explains the 5 versions of the Blue Marble (Apollo 17 was the first) and how you can download each NASA satellite image of Earth.

By stitching 400+ images from space, NASA’s Black Marble (Earth at Night) map the most comprehensive night view using Suomi NPP imagery.

Esri’s Living Atlas of the World is the largest curation of maps, apps, and data layers from authoritative providers around the world.