The expression "within one kilometer" is correct and usable in written English.
You can use it to describe the distance between two locations. For example: "The two towns are located within one kilometer of each other."
Typically, a landscape may be sampled broadly, with samples pooled together based on the assumption that baseline isotopic ratios will not vary appreciably within one kilometer (e.g., [ 2, 3]).
For example, seismologists from the Lamont-Doherty Earth Observatory of Columbia University, working with equipment supplied by the U.S. Geological Survey, are currently monitoring a swarm of earthquakes near Milford, New Jersey, within one kilometer of the mapped Ramapo Fault.
Access to Improved Water: Calculated with data from the WHO and UNICEF, this indicator measures the percentage of the population with access to at least 20 liters of water per person per day from an "improved" source (household connections, public standpipes, boreholes, protected dug wells, protected springs, and rainwater collection) within one kilometer of the user's dwelling.
An electric power utility entity shall not operate a new or modified power line carrier (PLC) system in the 135.7-137.8 kHz and/or 472-479 kHz bands if a previously coordinated amateur station pursuant to § 97.301(g)(2) of this chapter is located within one kilometer of the transmission lines conducting the PLC signal.
Another study by Dutch researchers showed that those who live within one kilometer of a park or wooded area suffer lower rates of depression and anxiety.
This rail corridor runs through the very densely populated west end of the city we're talking 30,000 kids in local schools, 96 daycare centers, and four long-term care facilities just within one kilometer of the tracks.
Neighborhood was defined as the area within approximately one kilometer or half a mile of the participants home or any area that could be walked to in 1015 minutes.
The Community Water Banks are located within a distance of one kilometer from each bike station.
The West Africa Coastal Vulnerability Mapping: Gridded Subset of Sub-national Poverty and Extreme Poverty Prevalence represents the HarvestChoice Subnational Poverty and Extreme Poverty Prevalence data set as a one kilometer raster, and includes values within 200 kilometers of the coast.
I have not jogged one kilometer since.
For an analogy, imagine making a one kilometer long flute.
