TIMELINEThis spot in every year — click to set A, shift-click for B
SHARED VIEW
HOW TO USE
Find the spot. Type an address, coordinates, State Plane X/Y or a parcel PIN — or press P and click a lot. Click anywhere on the map to see what was there in each year.
Pick years. Click a year for A, shift-click (or right-click) for B. Switch to Swipe, Fade or Change to compare, or hit Space to flip through every year.
Set the area.D to drag a box, "Use view", a square around the center, or "Use as area" from a parcel popup. Then press Measure A vs B to get acres, percentages and what turned into what.
Download. Choose years, format and resolution. GeoTIFFs and world files drop straight into QGIS / ArcGIS; "Values" saves the raw class codes.
Use Show and By in section 02 to switch between density, counts and race / ethnicity at tract, block group or block level.
Keys:←→ A · Shift+←→ B · 1234 single / swipe / fade / change · Space play · T timeline · K legend · L labels · D draw · P parcel · M measure · S share · Esc cancel
Share. The Share button makes a short link that opens this exact spot for anyone: same framing, years, compare mode, swipe line, area, pin, background and layers, plus an optional note.